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

Compute P (A/B), if P (B) = 0.5 and P (A∩B) = 0.32

From a pack of 52 cards, two are drawn one without replacement. Find the probability that both of them are kings.

An urn contains 5 red and 5 black balls. A ball is drawn at random, its colour is noted and is returned to the urn. Moreover, 2 additional balls of the colour drawn are put in the urn and then a ball is drawn at random. What is the probability that the second ball is red?

If the mean and variance of a binomial distribution are respectively 9 and 6, find the distribution.