Question

If p(a) = .40, p(b) = .30, and p(a and

b.= .15, then p(a/b) is

Answer 1

Given info
P(A) = 0.40
P(B) = 0.30
P(A and B) = 0.15

What we want to find: P(A|B)

Use the conditional probability formula
P(A|B) = P(A and B)/P(B)
P(A|B) = 0.15/0.30
P(A|B) = 0.50

Answer: 0.50