Probability- Union and Intersection

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Mere
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Probability- Union and Intersection

Postby Mere » Sat Oct 03, 2009 2:22 am

I need help with an intersection problem. I have listed the values and the question below. If someone could please explain how to do this problem I would be very, very happy!

P(A)= 0.6
P(B)= 0.55
P(A n B)= 0.35

Find: P(A n (not B))

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stapel_eliz
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Postby stapel_eliz » Sat Oct 03, 2009 6:44 pm

Mere wrote:P(A)= 0.6
P(B)= 0.55
P(A n B)= 0.35

Find: P(A n (not B))

Do you have a rule for complementation? Maybe something like P(A) = P(A-and-B) + P(A-and-(not-B))?

They've given you P(A) and P(A-and-B), so I think you have the necessary information. :wink:


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