There is a formula to use for this kind of problem (what is A given B). P(A | B) = [P (B ∩ A)] /P(B) which says the probability of A given B equals the probability of B and A over the probability of B. So if you make baseball A and basketball B you can plug them into the equation: P(A | B) = 0.04/ 0.15 When you solve I think you should get 27%
