Question

The probability of making the basketball team is 31%,

the probability of making the softball team is 32%,
and the probability of making one or the other is 50%.
What is the probability of making both teams?

Answer 1

prob(B or S) = Prob(B) + Prob(S) - Prob(B and S)

.5 = .31 + .32 - Prob(B and S)
prob(B and S) = .31 + .32 - .5 = .13 or 13%