Four men in a company of 10 employees are engineers. If 2 men are selected at random,then find the probability that exactly one of them will be engineer.

Six men in a company of 20 employees are graduates.If 3 men are selected from 20 at random,what is the probability that they are all graduates? What is the probability that at least one is a graduate?

A box contains 8 pairs of shoes.If 4 shoes are selected at random then find the probability that exactly one pair of shoe is selected.

From a group of 4 men ,3 women , 2 persons are selected at random, find the probability at least one man is selected ?

From a group of 3men and 2 women , two persons are selected at random . Find the probability that atleast one women is selected .

5 men in a company of 20 are graduates. If 3 men are picked out of the 20 at random, what is the probability that they are all graduates? What is the probability of at least one graduate?