Question

A and B are events defined on a sample space, with the following probabilities. Find P(A and B). Give your answer correct to two decimal places.

P(A) = 0.57 and P (B|A) = 0.38

Answer 1

Given P(A) = 0.57 and P (B|A) = 0.38
then P(A and B)=?
we have P (B|A)=P(A and B)/P(A)
0.38=P(A and B)/0.57
P(A and B)=0.38*0.57
P(A and B)=0.2166

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