An iphone salesperson tells you that 75 of phones brought in

An iphone salesperson tells you that 75% of phones brought in for repair have cracked screens. Among the phones with cracked screens, 15% have sustained water damage. What is the probability a phone has both a cracked screen and has sustained water damage?

Solution

P(both A and B) = P(A) * P(B givenA) = 0.75*0.15=0.1125