Given: P(does not work in the bank) = 80% or 0.80 P(work in the bank) = 1 - 0.80 = 0.20 = P(A) P(feminist) = P(B) P(work in the bank and feminist) = 10% or 0.10 = P(A and B) P(feminist given work in the bank) = ? = P(B given A) P(B given A) = P(A and B)/P(A) = 0.10/0.20 = 0.5 or 50%