According to Bayes' Theorem, the probability of event A, given that event B has occurred, is as follows. P(A) . P(B | A) P(A | B) = P(A) . P(B| A) + P(A') . P(B| A') Use Bayes' Theorem to find P(A| B) using the probabilities shown below. 7 P (A) = , P(A' ) = , P(B | A ) = - 10 , and P ( B A') = 10