a) P(B) =0.2

d) P(F) = 0.3

for c) and d) you need to make some assumption, such as B and F are independent. IF so, then b) is P(F/B) = P(F) = 0.3 If they are independent, one event does not affect the probability of the other event

c) P(B&F) is P(B)(P(F) = 0.2(0.3) = 0.06