Intersection and union of sets | Probability and Statistics | Khan Academy
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- Опубліковано 15 вер 2024
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Probability and statistics on Khan Academy: We dare you to go through a day in which you never consider or use probability. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We are constantly creating hypotheses, making predictions, testing, and analyzing. Our lives are full of probabilities! Statistics is related to probability because much of the data we use when determining probable outcomes comes from our understanding of statistics. In these tutorials, we will cover a range of topics, some which include: independent events, dependent probability, combinatorics, hypothesis testing, descriptive statistics, random variables, probability distributions, regression, and inferential statistics. So buckle up and hop on for a wild ride. We bet you're going to be challenged AND love it!
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That’s a bit rude
These tutors do not have misbehaving students to contend with when they are explaining... Hence it will always be easier than being in a class with disruptive students.!!!!
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If you have some spare time I would like to see a video on the barber paradox, should be a fun brain teaser for all ages.
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Thank you so much😂 that was very helpful. I never quite understood my teachers in these chapters but you explained it so good!
5:24 Shouldn't you also cover the intersection since you write X union Y = {3,12,5,13,14,15,6} but you don't cover 3 in the drawing.
What is the intersection of set 1:{t>5} and set 2: {6
great explanation ...really helped..thanks
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Y= myself! Islander stuff. Di Y! Directed intel, or mine! More Islander stuff. Or sets, ops = 3rd derivatives!
+4 {7,1} grids. Proof: 7-(4,3)= {3,4-- inverse of, calculus rule!} < detects N/A solutes!
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what if you need to define the intersect and both sets don't share any of the same numbers? how is that defined / expressed?
mettaworldwill That will give you an empty set or a null set.
You guys this is 7th grade math, but it is a stepping stone to more advanced stuff, such as abstract algebra, logic, and set theory, among other things.
Thanks for the help! Very understandable.
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There might be something I'm not understanding but "3" is NOT in x OR y. It is in BOTH therefore it is not in one OR the other. Even in the illustration only the things that DON'T overlap are shaded. (5:21-5:30)
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It is technically part of Algebra I curriculum. So, it depends on when you take Algebra I. Most students take Algebra between 7th and 9th grade, depending on their level of mathematical ability.
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I came here to find out what I found - not trivial: the word is not element, by the way, but "object". That's a good reminder to my issure, which concers intersecting sets: two objects do exist, and they are the same. What I see in the intersecting set done is some reducing to 1 what had been 2: before there were two objects both 3, doing the intersecting reduces both distinct objects to one 3, and, to me in a paradox, is abstraction. I would have expected the math approach to algorhythmically stick to a "what's there is there", I consider the Venn as concrete as concrete may be. - I came here because - sure - I wouldn't put two 3s into the cut set. Just one. Not to boo me take persons, not numbers, and I hopper for the best. - Writing down: Imagine one set defined as not excluding but allowing the 3, not having it in though (some Ukraine, imagine). The cutting done here would not show the 3 - because this is a possibility only. I do think this reaches out to what's called "fuzzy". The "And" must not be read as "A not exclucing 3 AND B not excluding 3? To complicate: You may define by "allowances" - however, what about the one set having it the other just not in a state of non-exclusion? I am puzzles as it should not make a difference, as here, one 3 is one 3. Last thought: what differs is the look at either the set or the "object". Here, we talk about the object.
Math is love, Math is Life
Sir i hav one dbt if p (A)=1 p (B)=1/2 then find p(A/B) , p(B/A). Sir i hav another dbt but if u clr that i undarstand that also..
Thank ya
Thanks
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1:15 excuse me? "These curly little brackets"
Those are braces 😂
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okay i got it but does it go for when you have like w=123 v=342 and y=468 when you are doing the Venn diagram and think you help me a lot better than my math teacher!!
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What is the intersection if there are two of the same number/value in one of the sets, and only one of the number in the other set? E.g.
X = {3, 3, 4} and Y = {3, 4, 5}
It's a little late, but sets are collections of unique, distinct, and unordered objects. So a set cannot have multiple of the same objects. Each element is unique, and all elements are distinct from each other. So if the set X = { 3, 3, 4 }, this is really just a confusing way to write the set, because a set can only count one 3. In other words { 3, 3, 4 } = { 3, 4 }. So X = { 3, 4 }. Then if Y = { 3, 4, 5 }, we have that X intersect Y equals { 3, 4 }. Hope that helps you or someone reading this in the future!
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