If P (A) = 7/13, P (B) =9/13 and P (A ∩ B) = 4/13, find p (A/B).

A box of oranges is inspected by examining three randomly selected oranges drawn without replacement. If all the three oranges are good, the box is approved for sale otherwise it is rejected. Find the probability that a box containing 15 oranges out of which 12 are good and 3 are bad ones will be approved for sale.

A bag contains 4 white, 7 black 5 red balls. Three balls are drawn one after the other without replacement. Find the probability that the balls drawn are white, black and red respectively.

If A and B are events such that P (A) =0.6, P (B) = 0.3 and P (A ∩ B) = 0.2, find P (A/B) and P(B/A).

If A and B are two events such that P (A ∩ B) = 0.32 and P (B) = 0.5, find P (A/B).