Permutations and Combinations Tutorial

Поділитися
Вставка
  • Опубліковано 24 гру 2024

КОМЕНТАРІ • 2 тис.

  • @TheOrganicChemistryTutor
    @TheOrganicChemistryTutor  2 роки тому +168

    Final Exams and Video Playlists: www.video-tutor.net/
    Full-Length Videos & Worksheets: www.patreon.com/MathScienceTutor/collections
    Next Video: ua-cam.com/video/UORztmWGY6Q/v-deo.html

    • @hilyanehoya9711
      @hilyanehoya9711 Рік тому +3

      But us we did permutations with and without repetitions
      Why am i only seeing without repetitions

    • @alfredbconteh
      @alfredbconteh 9 місяців тому

      Deeply explain the concept and also simple and easy to understand

    • @RollandBemu-hu2ms
      @RollandBemu-hu2ms 3 місяці тому

      Dear Teacher, I need help with a question. Can I ask you? Please.

    • @mukhtarabdulrazaq2879
      @mukhtarabdulrazaq2879 2 місяці тому

      17:40

  • @vanpeng9917
    @vanpeng9917 3 роки тому +3955

    This man just taught me permutations and combinations in 7 minutes when my teacher couldn't do it for an hour.

    • @joshr.5199
      @joshr.5199 2 роки тому +84

      I would like this comment, but I see it is at 69. Nice.

    • @iyah1050
      @iyah1050 2 роки тому +15

      @@joshr.5199 it's now 169

    • @weyden7590
      @weyden7590 2 роки тому +13

      @@iyah1050 it's now 174...but i added a like.

    • @karthikeyang2037
      @karthikeyang2037 2 роки тому +8

      @@weyden7590 176

    • @weyden7590
      @weyden7590 2 роки тому +9

      @@karthikeyang2037 its 177 now lmaooo let's stop😂

  • @Fahimsy3d
    @Fahimsy3d 3 роки тому +1224

    This legend right here has been saving my life since 11th grade, and now I am going into my third year of aerospace engineering and still still following through his videos. Sometimes I wish more of my tuition went to Organic Chemistry Tutor than my professors.

    • @namanjain3542
      @namanjain3542 2 роки тому +26

      you can donate him

    • @peppathedemonslayer5338
      @peppathedemonslayer5338 2 роки тому +14

      I'm in grade 9 when I learn this in school, this is not fair

    • @hookey24
      @hookey24 Рік тому

      This is not permutation, but variation vs combination. He did not say anything about permutations!

    • @Quintessential.96
      @Quintessential.96 Рік тому +14

      ​@@hookey24 🤦🧐

    • @aditinarayanan
      @aditinarayanan Рік тому +11

      @@hookey24 you *may* just *may* wanna look at the title again... 😶

  • @tcoolspy
    @tcoolspy Рік тому +663

    Thanks! Your channel has been invaluable in helping my daughter with her homework!

  • @juskonajak706
    @juskonajak706 29 днів тому +5

    I am in Africa, and MISSISSIPPI is a common question. I appreciate the dedication you put into this work!

  • @richunclejoey2249
    @richunclejoey2249 2 роки тому +192

    As a 40yo+ self employed quantitative analyst I always find myself here to stay sharp. Great work. Best channel on the tube

    • @naadde
      @naadde Рік тому +1

      I myself also come to videos like these just to repeat basics. In the end basics can't be mastered too well

    • @hookey24
      @hookey24 Рік тому

      This is not permutation, but variation vs combination. He did not say anything about permutations!

    • @psyko9505
      @psyko9505 Рік тому

      Hey, Can you please tell me what topics should i study to become a quant?

  • @JT-od9hm
    @JT-od9hm 4 роки тому +113

    “If you want to know why? That’s just the way it is.. I don’t have an answer for you” best part of the video by far

  • @benjamin_dinnerbone7128
    @benjamin_dinnerbone7128 3 роки тому +5887

    2 hours before a test and i always find myself here

  • @endzeitx
    @endzeitx 5 років тому +323

    I haven't been attending much classes throughout the years, this guy keep saving me for my exams. Much thanks

  • @LordLauK
    @LordLauK 2 роки тому +266

    Who's here because you have a test tomorrow

  • @andrewhooker7184
    @andrewhooker7184 3 роки тому +59

    This person is the reason I am passing my classes! Thank you for your easy-to-follow videos!

  • @daniel5749
    @daniel5749 6 років тому +2991

    "0 factorial does not equal 0, 0 factorial equals 1...if you're wondering why.... that's just the way it is. I don't have an answer for you." 10:52 Savage LOL

    • @DariusGaugamela
      @DariusGaugamela 6 років тому +44

      That was awesome LOL

    • @prncess1848
      @prncess1848 6 років тому +69

      The reason why 0! Equals 1 is because when you do 0!= 1!/1! (One factorial over one factorial) it just cancels out to 1. It’s the same if you were to do 2!=3!/3!. When you expand the equation, You would cancel out the 3 on the bottom with the three on the top and be left with 2 times 1 which, of course, is 2!

    • @dimitrijep7872
      @dimitrijep7872 6 років тому +114

      @@prncess1848 u explained it right except that " 2!=3!/3! " should not have factorial in the denominator, thus it would look like " 2!=3!/3 "
      standard formula would be
      n! = (n+1)! / (n+1)

    • @neeraj8278
      @neeraj8278 6 років тому +253

      Just think, how many ways are there to arrange 0 objects, there's one way, just like that...

    • @dylansanderson3663
      @dylansanderson3663 6 років тому +18

      @@neeraj8278 exactly lol.

  • @ChristinaWahlquist-h5z
    @ChristinaWahlquist-h5z 10 місяців тому +12

    Dude, you continue to be my private tutor in nearly all my courses! I can't thank you enough! Taking discreet math and so thankful for your videos tonight. Seriously, I've been watching your videos for 2 years from Math 1080 through the Calculus series and now discreet. Keep it up!

  • @fairydragon537
    @fairydragon537 4 роки тому +73

    Exam in 7 hours and I understand nothing at school...
    YOUR THE BEST TEACHER THAT I EVER KNOW !!! THANK YOU FOR MAKING MY LIFE EASIER

  • @bekab5162
    @bekab5162 3 роки тому +7

    I have been watching your videos for the last 2 weeks. Today I took my mathematics exam and passed with 182. I can not Thank you enough. I couldn't have done it without your helpful videos.
    Thank you!!!!

  • @R.Senate
    @R.Senate 8 місяців тому +1

    7 years ago and still helpful. Thanks a lot!❤

  • @amanuelbirhan9506
    @amanuelbirhan9506 4 роки тому +544

    It's funny when he says, "If you're wondering why...that's just the way it is."😂😂😂

    • @Rafael_Dimla
      @Rafael_Dimla 3 роки тому +18

      it eezz what it eezz

    • @nivritipedaballi4252
      @nivritipedaballi4252 3 роки тому +4

      its kinda hard, because hes just saying the formula, but it would have been nice if he explained why it is that way and how he got there
      its better teaching

    • @gustavlotz5415
      @gustavlotz5415 3 роки тому +4

      its because you can arrange the set { 0 } in 1 way

    • @rydm0541
      @rydm0541 3 роки тому +8

      okay so why is 0! = 1?
      4! = 4 x 3 x 2 x 1 = 24
      3! = 3 x 2 x 1 = 6. We divide 4 from 4!.
      2! = 2 x 1 = 2. We divided 3 from 3!.
      1! = 1, dividing 2 from 2!
      0!???, divide 1 from 1!, its still one

    • @johnlloydperez9755
      @johnlloydperez9755 3 роки тому +3

      it's means don't ask anymore questions🤣

  • @otaku_mcface9191
    @otaku_mcface9191 5 років тому +64

    I have my math test tomorrow and I accidentally fell asleep in the class where my teacher was explaining this and omg this helped so much thank you!!!!! You’ve saved my life for chemistry too! You’re awesome!!

  • @Krazieninja01
    @Krazieninja01 4 роки тому +34

    This video was posted in 2017... it is now 2020, and I keep coming back to this amazing channel for help with chemistry and now statistics. You are such a wonderful and knowledgeable guy! Thank you for sharing your knowledge and helping thousands of people!!!

    • @dhimandas5673
      @dhimandas5673 2 роки тому +3

      Now it's 2022...... Still wonderful

    • @marufurrahman250
      @marufurrahman250 Рік тому +3

      @@dhimandas5673 2023 still goated. Its just timeless!!!

    • @stellak7134
      @stellak7134 11 місяців тому +1

      ​@@marufurrahman250 Just entering 2024 and can attest that this vid is timeless.

  • @JessyeFord
    @JessyeFord 2 місяці тому +1

    Dude...I'm 47 years old and have never grasped math the way I did watching your videos! Thank YOU!!

  • @maria2k5
    @maria2k5 Рік тому +3

    i've been struggling really badly in CIE additional mathematics for the past few months, mainly because i wasn't getting the hang of a few chapters, this one included. my ex math tutor introduced this chapter to me quite a long time ago, and today is the day i REALLY understood the concept, which is astonishing. i've always hated this chapter, because it seemed so confusing and incomprehensible. i tried reading the text book, that has even worse explanations, i went to my older sister, still didn't understand; and today i finally decided to go and check on the internet. i still wasn't getting it from trying a few channels and then i bumped into this guy. and im SO thankful, cause i cant believe i understood a concept that i've been struggling to grasp for MONTHS in a matter of 17 freaking minutes. dear organic chemistry tutor, if you're reading this, i want you to know that you're a hero. you have no idea how much of an immense help you were to me today, and to millions others. not all heroes wear capes, sometimes they run a youtube channel to help others out. keep up this amazing work!!

  • @jamiesuka813
    @jamiesuka813 6 років тому +160

    I love how he explains the difference between permutation and combination. It took a me a couple example to finally grasp the advantage of using the formula provided. Not only it made bigger equations to solve but instead of drawing them out which could take longer. The recognition of the two different problems is also an important factor because you don't want to end up using the wrong formula
    Jamie Toloa

    • @aa7352
      @aa7352 4 роки тому +1

      Same ! I didn't know the difference

    • @elithluxe7568
      @elithluxe7568 2 роки тому +2

      That's my issue. I understand everything and how to do it. But I don't understand how to know which one to use and to recognize the two types of problem

    • @asarereuben7123
      @asarereuben7123 Рік тому

      Same here
      I’m now okay

  • @miaazlan2412
    @miaazlan2412 4 роки тому +461

    arrange=permutations
    4:33 - calculating permutations
    6:00 - calculating combinations
    7:36 - sample questions + working

  • @darrughwilliams5947
    @darrughwilliams5947 4 роки тому +42

    This man kno everything. It always his voice explaining any math problem. Im tryna nominate this man for a nobel piece prize.

  • @animemysteries
    @animemysteries 2 роки тому +10

    iruka sensei couldn't teach me this even with a whole week on just this subject, it was a drag. you taught me this in 10 minutes. you are now my new sensei, thank you

    • @Zion122
      @Zion122 2 роки тому +1

      after seeing this comment, my faith in humanity has been restored once again

    • @AsserRoblox
      @AsserRoblox Рік тому

      ​@@Zion122 my faith in humanity was lost reading it

    • @GamersHaventube
      @GamersHaventube 3 місяці тому

      🎉😂🎉😂🎉😂🎉f{o\o\l

  • @bodashatta8429
    @bodashatta8429 3 роки тому +3

    this guy never lets me down whever im stuck at any subject he is here to save the day

  • @dorfinhorg9458
    @dorfinhorg9458 4 роки тому +12

    Dude you're the organic Chemistry tutor but you have so much content. You are truly a special human being

  • @hafeezahmed4023
    @hafeezahmed4023 7 років тому +655

    A wonderful voice and elegant way of explaining. I just like your voice and style of teaching. So nice.

  • @tahjaelindsay4108
    @tahjaelindsay4108 4 роки тому +125

    This man needs to be recognized by youtube🔥

  • @emmanuelwhite7272
    @emmanuelwhite7272 3 роки тому +3

    This man is the best teacher I have seen so far. thank you, God bless you!

  • @cow9310
    @cow9310 11 місяців тому +19

    Watching this 1 hour before my final exam

  • @amawm8599
    @amawm8599 5 років тому +11

    Tutor(teacher) speaks with himself
    I go back home and watch your videos so I pretend that I understand his "teaching" style.
    You are a life saver

  • @internet_nerds9156
    @internet_nerds9156 7 років тому +1008

    I have to really give a shout out to you. There is literally no one else that has your type of extensive videos on pre calc and other subjects. Of course there are better channels for certain subjects but you rival Khan Academy and other video making giants with great content. Thanks!

    • @josephore9613
      @josephore9613 5 років тому +2

      Which channels I need a video for some topics he doesn't have e.g damped oscillation

    • @matthewneba3033
      @matthewneba3033 5 років тому

      Khan Academy?

    • @minhtuando6775
      @minhtuando6775 5 років тому +48

      Khan Academy is dusted by this guy. Really clear in explanation, no um, ah, um, um, f, f, etc.

    • @fabiolacuevas8912
      @fabiolacuevas8912 4 роки тому +8

      @@minhtuando6775 my Algebra 2 teacher says um ah um eh every 5 seconds. It's so fucking annoying.

    • @suvangoda7773
      @suvangoda7773 4 роки тому

      @@minhtuando6775 oh ya lol

  • @anythingman9504
    @anythingman9504 6 років тому +130

    You reach everything with the most simple words
    I love you and I believe everyone does
    You are the only hope when I don't u understand a topic

    • @HamedRigi1998
      @HamedRigi1998 5 років тому +3

      wow!!!! that's exactly how i feel... through out the semester I just believe and know I will understand more from this page!

  • @keananpather6957
    @keananpather6957 3 роки тому +1

    Bro people say Discrete math is hard until it finally clicks... you finally made it click for me. Thank you so much brother!!

  • @haleyib584
    @haleyib584 2 роки тому +83

    Without you I probably would’ve failed my physics exam, so thank you for making these extremely helpful videos

  • @alenaj1579
    @alenaj1579 5 років тому +10

    Honestly man, you saved me. I tried to understand this topic, but never could visualise the difference between permutations and combinations, now I got the difference thanks you to. Thank you so much!

  • @midnightstar3340
    @midnightstar3340 5 років тому +12

    was with you for chem last semester...now i'm with you for stats...GOAT

  • @crashingintoearthwithmalic2088
    @crashingintoearthwithmalic2088 5 років тому +1958

    Not all capes wear heroes...

  • @zahrasaeed4343
    @zahrasaeed4343 3 роки тому

    And I've been stressing over this since the past 4 hours 😭😭 thank you math lords

  • @keffahnjenga9079
    @keffahnjenga9079 3 роки тому +18

    😁1 out of 5 University students recognizes You as the Soul Professor🎓.. keep sharing this knowledge 💪🏽

  • @patrycjaazarczyk9446
    @patrycjaazarczyk9446 Рік тому +3

    I just want to say THANK YOU , I been watching you since my algebra class and now I'm in statistics and I have to say the way you explain things, they are so more understanding and easier than the way the professors teach and I just have to say THANK YOU FROM THE BOTTOM OF MY HEART.

  • @emx_kel
    @emx_kel 5 років тому +14

    This is the first explanation of permutations and combinations I've seen, that actually explains the difference between both!!!
    Thanks alot. this is a masterpiece

  • @edmundappiah310
    @edmundappiah310 2 роки тому +3

    This guy is the word GENIUS😂😂😂He just taught me permutations and Combinations in just 2mins

  • @fisnikukeperaj7653
    @fisnikukeperaj7653 Рік тому +1

    Fudge he taught it to me better than anyone could in the course of 2 weeks,he deserves the sub

  • @chiviza
    @chiviza Рік тому +1

    I remember my calculus professor proved to us why 0! = 1 and it was mind blowing. Loved that professor.

  • @ahmedtresh1426
    @ahmedtresh1426 8 місяців тому +153

    Who's from 2024 are allowed to like this comment

    • @xuyuansha777
      @xuyuansha777 5 місяців тому +1

      First in replies

    • @pumkin610
      @pumkin610 4 місяці тому +1

      Second in replies 🥈 Friday, August second, 2024

    • @PR0DBYKANI
      @PR0DBYKANI 4 місяці тому +1

      Are U by any chance from Malawi university of science and technology😂😂​@@pumkin610

    • @GRACEMWABAvi2xb
      @GRACEMWABAvi2xb Місяць тому

      A day before the exam 😅😅

  • @nosikuminyoi18
    @nosikuminyoi18 4 роки тому +25

    "If you're wondering why , that's just the way it is. I don't have an answer for you" 😂😂😂

  • @miniconico6831
    @miniconico6831 3 роки тому +6

    THANK YOU I JUST STUDIED A WHOLE MONTH OF CLASSES WITHIN TWO HOURS FOR MY EXAM 😭😭😭

  • @Giantlobster_
    @Giantlobster_ 8 місяців тому

    I may be late to the party here but i seriously want to express my appreciation. It is insane to me how the exact same topic can seem either incredibly intimidating and hard or fairly simple depending on the explanation/person who explains. This is by far the best video on this topic. You sir saved my day.

  • @giechrisrubia6795
    @giechrisrubia6795 3 роки тому +2

    Hi! I've been watching your videos since 2015 and I really have to thank you for getting me through Highschool. Just a year more, and I'll be a freshman in college. Time flies so fast! I also have to get back here and thank you when I'll be a doctor someday. I don't know if you'll be able to read this, but I hope you get the best of happiness and luck in life.

  • @alexazure3926
    @alexazure3926 2 роки тому +4

    Okay, I just used this channel to learn my entire syllabus in one weekend... My teacher couldn't finish the syllabus in one year (the little he did teach no one grasps a thing so)...
    Thank you very much for all your hard work and time! You are the best!!!

  • @teenamartina6780
    @teenamartina6780 5 років тому +39

    When he said he changed his mind not to end this video I just had to laugh I mean sir, you're not just a hero but you're funny too I mean

  • @sorryillknow99
    @sorryillknow99 Рік тому +12

    10:51 If there's anyone wondering, I think I figured out why 0! is equal to 1 while watching the video. Basically, if n is like the menu of things you're choosing, and r is the amount of things you can choose from that menu. We can see in the question that n is 5, r is also 5, meaning you have to pick everything out of the menu and not leave anything out. Therefore, there's nothing to cancel out at the bottom to account for anything you can't pick. And having a look at the numbers that fill the spaces at the top left of the screen, I can understand it's the same as just dividing the full factorial by 1. (Please feel free to ask me about any part of my explanation if it was still confusing for you.)

    • @AA-vb2ci
      @AA-vb2ci Рік тому

      This makes perfect sense! Thankyou so much!

    • @INCENDIUSX
      @INCENDIUSX Рік тому

      I'm just happy they gave it outright and didn't ask us to go on a goose chase to find it

  • @sirajul-anik
    @sirajul-anik Рік тому

    I switched from incognito to regular window just to give it a thumbs up.
    I studied this topic around 14-15 years ago. I didn’t understand any of it other than memorizing and writing in the exam papers.
    Due to CWC 2023, I wanted to know how 10 teams playing each other once will have 45 matches in total.
    I don't want to blame my teachers. They tried their best. Either I was not paying attention or they didn't know that we didn't understand at that time.
    But kudos to you. Now it seems easy to understand.

  • @mshaynerushton
    @mshaynerushton 2 роки тому

    The only thing I would change about this channel is the volume. Like many of you, i'll probably owe my degree to this guy.

  • @melb23boy66
    @melb23boy66 4 роки тому +93

    "wanna know why? I'm not telling you." lmao

  • @riwarassi3311
    @riwarassi3311 6 років тому +35

    I can never fully understand a math concept unless I watch one of your videos

  • @waelbadria9385
    @waelbadria9385 3 роки тому +7

    Man, you are such a great teacher. I really appreciate your efforts.

  • @McKennaAuston
    @McKennaAuston 2 місяці тому +1

    the way your brain works is incredible. you have gotten me through years of math and science

  • @Solomon_Ayuba
    @Solomon_Ayuba 7 місяців тому

    7 years later and this video is still saving lives. Thank you man!

  • @grace_mango6182
    @grace_mango6182 2 роки тому +3

    You have such a gift with teaching! Thank you for being willing to share it with the world via youtube!

  • @infectiouslizzie
    @infectiouslizzie 3 роки тому +5

    You're saving my life in this Statistics class, thank you so so much for making these videos breaking down the steps and trying them out over and over. My brain needs this kind of teaching. Thank you!!!!!

  • @tijaduno3417
    @tijaduno3417 5 років тому +8

    You are the real MVP. This just made my day having been struggling with the topic. U made it soo simple. I quickly had to share the video with my classmates.

  • @faustinoelia965
    @faustinoelia965 7 місяців тому +1

    This is the best channel for learning maths

  • @youngcranberry482
    @youngcranberry482 Рік тому +1

    I have been finding relevant videos to whatever I may be doing - from the beginning of middle school up until present day, being in the middle of college. You are amazing and continue to blow my mind. Thank you.

  • @joshjam4359
    @joshjam4359 2 роки тому +25

    Paying fees just to come and learn everything on UA-cam 😂

  • @charlizedevilliers
    @charlizedevilliers Рік тому +3

    7:34 I literally jumped when thew add popped up because I was not expecting that, I was so focused😂

  • @anevilsaint9557
    @anevilsaint9557 5 років тому +11

    TY BRO

  • @Murphy877
    @Murphy877 4 місяці тому

    I love this man so much, he has taught me more things in 17 min than a 30 day course about geometry

  • @kyutelav8610
    @kyutelav8610 2 роки тому +2

    My teacher didn’t even bother to teach me this, thank you for helping me out with my end of the year exam!!!!

  • @spicyshizz2850
    @spicyshizz2850 2 місяці тому +5

    11:00 its because there is only 1 way of 0 things... 0 things

  • @taiwoogunleye4218
    @taiwoogunleye4218 6 років тому +19

    u are a really great teacher , u made it so easy to understand, thanks for this

  • @geminiflame_
    @geminiflame_ 5 років тому +7

    I watched a few of your videos and because you have helped me SO DAMN MUCH I definitely feel it's only fair to say THANK YOU and keep it up. I will forever be grateful, and will continue to turn to you for help.

  • @rma1563
    @rma1563 Рік тому +1

    14:02 The fact you changed your mind and came back deserves some appreciation 😅. Thank you. Great explanation. It's 6 years old! ❤❤❤

  • @AshiJain31
    @AshiJain31 Місяць тому

    Useful for me ..... started Probability but was stuck at this point now it's clear....
    Thankyou

  • @sabaalsayyed7059
    @sabaalsayyed7059 3 роки тому +6

    his voice is so soothing

  • @HugoCornellier
    @HugoCornellier 4 роки тому +241

    Incredible video, thank you so much!

    • @asfootball8787
      @asfootball8787 4 роки тому +5

      photo everyday!!!

    • @ItsKennedy
      @ItsKennedy 4 роки тому +1

      Legend

    • @sanieljedrickm.7726
      @sanieljedrickm.7726 3 роки тому

      helloooo omj your the one with pics hellooo

    • @PenandPaperScience
      @PenandPaperScience 3 роки тому +1

      If you want some more practice, you might want to check out my latest upload, where I solve such exercises step-by-step:
      ua-cam.com/video/siSc7VEfG3c/v-deo.html
      :)

  • @atotesfa1507
    @atotesfa1507 2 роки тому +7

    You are the key to our problem keep it bro. God bless u

  • @autumnrenee1605
    @autumnrenee1605 Рік тому

    GREAT video!! Thank you!! Still a huge help 6 years later. Now THAT'S a legacy.

  • @jyothikajavvadi3838
    @jyothikajavvadi3838 2 місяці тому +1

    Thanks alot mann...u saved my life right now...

  • @cameroncornell7992
    @cameroncornell7992 4 роки тому +13

    Studying for the GMAT and needed a massive refresher on permutations and combinations. This has been insanely helpful

    • @dirys24
      @dirys24 Рік тому

      so did you pass the gmat? if yes any tips?

  • @jedidiahagozie4373
    @jedidiahagozie4373 2 роки тому +3

    5 years later and stil saving lives.
    Literally an hour my exams lol

  • @Lexyvil
    @Lexyvil 2 роки тому +6

    This helps! Thank you. I'm struggling in Probability at my university, and I thought the "P" in nPr meant Probability, not Permutation. That explains a lot.

  • @BTSofOsten
    @BTSofOsten 2 місяці тому

    Sir, I think you should get an award for how many students you have helped. Thank you for everything 🙏🏼

  • @caamarnathnadar
    @caamarnathnadar Рік тому +1

    I thought factorials was hard. But after seeing this video, I changed my mind. Nice explanation. But, these are of low level. Please post videos of advanced factorials.

  • @pcgamingmaster69
    @pcgamingmaster69 6 років тому +175

    Can we recruit this guy as professor on youtube?

  • @alittleatinyatiny1821
    @alittleatinyatiny1821 3 роки тому +6

    I just come to his videos to learn new things on my free time and listen to his soothing voice✨😄

  • @mostafaelgayar
    @mostafaelgayar 5 років тому +7

    I love how you explain these mathematical tricks in between, which are totally off-topic but so helpful. Thank you!

  • @alanagamble8776
    @alanagamble8776 2 роки тому +1

    I haven't been in school in over 20 years! Had to help my high schooler w/ her homework, this video was SUPER simple and helped me greatly!! Thank you!!!

  • @arsemaesubalew1508
    @arsemaesubalew1508 2 роки тому

    Not only did I understand the topic, but also I had seen new techniques. OMG thanks !!!!!! best teacher ever!

  • @audreylenell
    @audreylenell 7 років тому +6

    Awesome Lesson!!! I was able to grasp the concept waaaayyy better from your way of explaining. Just great. Thank you Thank you Thank you!!!

  • @murjer1
    @murjer1 6 років тому +9

    You're an AWESOME teacher!! Thank you SO MUCH! I'm studying for the GRE and your videos are immensely helpful! Thanks again!!

  • @gabrielegenota1480
    @gabrielegenota1480 6 років тому +195

    Exams tomorrow lol
    Ty

    • @safwanljd
      @safwanljd 3 роки тому +3

      same tbh even tho we're not referencing the same point in history

    • @dhanushranga1
      @dhanushranga1 3 роки тому +1

      same

    • @sazzadhossain1038
      @sazzadhossain1038 3 роки тому

      My exam isn't tomorrow but near future

    • @justpinguvibin2894
      @justpinguvibin2894 3 роки тому

      lol its literally tomorrow

    • @ellichen6748
      @ellichen6748 3 роки тому

      we’re just starting this unit. i watched this video to get a head start lol so i can better understand my lesson 😂

  • @yevgeniyterekhin3711
    @yevgeniyterekhin3711 19 днів тому +1

    At 11:11,
    0!=1 is not just what "you have to know" but rather is what you CAN calculate if you know that n!=n×(n-1)!
    If n=1, you are getting 1!=1×0! or 1=1×0!. Then, 0! has to be 1.

    • @ZoeZ.U.
      @ZoeZ.U. 14 днів тому

      That plus the fact that there is only 1 way to arrange zero amount of things. That is why 0! = 1.

  • @ValeriaGalindo
    @ValeriaGalindo 5 років тому +4

    thank you so much for this video, you don´t know how much it helped me!

  • @whoatemypickles4498
    @whoatemypickles4498 4 роки тому +6

    Idk why I’m learning this😂... I don’t even know what this is but i get it somehow

  • @theinsignium1921
    @theinsignium1921 4 роки тому +5

    14:14, Does "INCEST" work?

  • @sherlylenin4922
    @sherlylenin4922 Рік тому +1

    For the first time i am understanding this topic. Thank you Sir🙏

  • @HandledNanner
    @HandledNanner 2 роки тому

    YOU explained in 15mins what i couldn't comprehend in a 3hr class ! Thank you ! keep being amazing !