You made this easy, somehow. I have literally shed tears today trying to figure this out. I was turned away by tutors at my university because my math class wasn't "advanced" enough for them to help me. Thank you, kind stranger, for helping me. I'm so thankful for the helpers of the world like you.
P(A'uB') represents anything in the region "not A", anything in the region "not B", and anything in the overlap of these two regions. So "not A" is the 8 and 4, "not B" is the 15 and 4, and the overlap of course is the 4. So P(A'uB') = (8 + 15 + 4)/30 = 27/30 = 9/10
If you had two venn diagrams and you were told neither A or B is 0.1. Which sections of the venn diagram would it be? Also whats would the notation be... would it be P(A'uB')
![A-Level Maths: M1-04 [Probability: Finding Missing Probabilities]](http://i.ytimg.com/vi/kdtjROIJ9pY/mqdefault.jpg)
![A-Level Maths: M1-04 [Probability: Finding Missing Probabilities]](/img/tr.png)
You made this easy, somehow. I have literally shed tears today trying to figure this out. I was turned away by tutors at my university because my math class wasn't "advanced" enough for them to help me. Thank you, kind stranger, for helping me. I'm so thankful for the helpers of the world like you.
thanks for the funny shapes mr. maths man, you don't realize how much of a visual learner you are until you are
Really clear and helpful, thank you
I’m still a bit confused on the last one, could you try and explain it in a different way
P(A'uB') represents anything in the region "not A", anything in the region "not B", and anything in the overlap of these two regions. So "not A" is the 8 and 4, "not B" is the 15 and 4, and the overlap of course is the 4. So P(A'uB') = (8 + 15 + 4)/30 = 27/30 = 9/10
@@TLMaths Brilliant explanation 👍
This man had a cool brain
So helpful !!
If a question ask you to write down a mutaully exclusive pair, from a ven diagram how would you write it?
The Venn diagram would show two circles that don't intersect.
If you had two venn diagrams and you were told neither A or B is 0.1. Which sections of the venn diagram would it be? Also whats would the notation be... would it be P(A'uB')
I would assume they're meaning everything outside of the two circles is 0.1.
This can be represented as P((AuB)') or as P(A'nB')
@@TLMaths Yup, Thanks
Very elaborate
Thank you so much
Why do you add up the total surely for the first one it would just be 2/4
Is this for P(A)?
Where are you getting the 2 and the 4?
for question g why didn't you add 4 to eight because it said A' so shouldn't we add the 4, a bit confused
It's asking for the overlap of A' and B. That only happens with the 8.
Thank you😭💜
What about p(a'ub)
In this example, P(A'uB) would be P(A') + P(B) - P(A'nB) = 12/30 + 11/30 - 8/30 = 15/30 = 1/2
I am so lost about the last one
Might using the formula help?
P(A'uB') = P(A') + P(B') - P(A'nB')
I thought P(AuB) = P(A) + P(B) - P(AnB)
So for part e why woudn't it be (15+8-3)/30 ?
No, P(A) = 18/30 (as in part a.), and P(B) = 11/30 (as in part c.).
So P(AuB) = 18/30 + 11/30 - 3/30 = (18 + 11 - 3)/30 = 26/30 = 13/15
@@TLMaths ohhh right - thanks so much for ur quick reply
What if it was P(AuB') or vice versa?
Well P(AuB') = P(A) + P(B') - P(AnB')
which in the case of this video is
= 18/30 + 19/30 - 15/30 = 22/30 = 11/15
@@TLMaths thank you so much. i managed to get an A+ on my Math test thanks to you.
P(AnB) = 3/30?