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# S1 probability query URGENT Watch

1. I'm unsure when to apply P(AnB)=P(A)xP(B) with regards to Venn diagrams

I know this applies to independent events and that mutually exclusive is not necessarily independent since it has no intersection. But can mutually exclusive events be independent? I understand how to use the above formula for tree diagrams but I don't understand how it applies to Venn diagrams.

THANK YOU SO MUCH

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2. P(AnB) in a Venn diagram is in the intersection bit. If P(AnB) = P(A) x P(B) we can see that they are independent.

Mutually exclusive is when P(AnB) = 0, as there is no intersection in the venn diagram.

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Updated: May 16, 2013
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