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Understanding Probability for Independent Events
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02 Mar 2020, 18:43
02 Mar 2020, 18:43
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Hello! There's something I'm struggling to understand about the probability of independent events.
If there are two IEs, A and B, why isn't the P(A) = P(A) - P(A U B) instead of P(A) = P(A) x P(not B)?
I don't understand it -
It usually works for me to visualize IEs as a venn diagram within a rectangle - so to rephrase in a visual way - why isn't the P(A) just all of circle A without the overlap of circle B? Why is it instead circle A times 1 minus P(B)?
If there are two IEs, A and B, why isn't the P(A) = P(A) - P(A U B) instead of P(A) = P(A) x P(not B)?
I don't understand it -
It usually works for me to visualize IEs as a venn diagram within a rectangle - so to rephrase in a visual way - why isn't the P(A) just all of circle A without the overlap of circle B? Why is it instead circle A times 1 minus P(B)?
Re: Understanding Probability for Independent Events
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03 Mar 2020, 03:52
03 Mar 2020, 03:52
Expert Reply
here two links to brush your skills and go deeper into the matter
https://www.wyzant.com/resources/lesson ... robability
https://www.mathsisfun.com/data/probabi ... ndent.html
However, I would not spend crazy time on this topic. The GRE exam maybe will throw to you one question on probability at most if no one whatsoever.
Regards
https://www.wyzant.com/resources/lesson ... robability
https://www.mathsisfun.com/data/probabi ... ndent.html
However, I would not spend crazy time on this topic. The GRE exam maybe will throw to you one question on probability at most if no one whatsoever.
Regards
Re: Understanding Probability for Independent Events
[#permalink]
16 Mar 2020, 17:32
16 Mar 2020, 17:32
Advocadate wrote:
Hello! There's something I'm struggling to understand about the probability of independent events.
If there are two IEs, A and B, why isn't the P(A) = P(A) - P(A U B) instead of P(A) = P(A) x P(not B)?
I don't understand it -
It usually works for me to visualize IEs as a venn diagram within a rectangle - so to rephrase in a visual way - why isn't the P(A) just all of circle A without the overlap of circle B? Why is it instead circle A times 1 minus P(B)?
If there are two IEs, A and B, why isn't the P(A) = P(A) - P(A U B) instead of P(A) = P(A) x P(not B)?
I don't understand it -
It usually works for me to visualize IEs as a venn diagram within a rectangle - so to rephrase in a visual way - why isn't the P(A) just all of circle A without the overlap of circle B? Why is it instead circle A times 1 minus P(B)?
Probably because the equations mentioned above are not consistent with the venn diagram description. Explanation regarding venn diagram description is correct, not the equations - probably if you can share the link from which the equations are taken, or a screenshot - I can attempt to explain it better.
