P ( L l R ) = P(L and R) / P (R)
Rearranging this we have that
P(R) = P (L and R) / P(L l R) = 0.03 / 0.0625
Second one.....we have 60 girls....18 prefer a clay court...so the probability of choosing a girl at random who prefers a clay court is 18 / 60 = 3 / 10
