Chapter 3.2, Problem 35E

According to Bayes’ Theorem, the probability of event A, given that event B has occurred, is

$P(A|B)=\frac{P(A)\cdot P(B|A)}{P(A)\cdot P(B|A)+P(A^{\prime })\cdot P(B|A^{\prime })}.$

In Exercises 33–38, use Bayes’ Theorem to find P(A|B).

35. P(A) = 0.25, P(A′) = 0.75, P(B|A) = 0.3, and P(B|A′) = 0.5