Question

A committee of 4 students is selected at random from a group consisting of 7 boys and 4 girls. Find the probability that there are exactly 2 boys in the committee, then that at least one girl must be there in the committee.

Answer 1

Let A and B be two events such that

A = Selection of committee having exactly 2 boys.

B = Selection of committee having at least one girl.

The required probability is \(P\left(\frac{A}{B}\right)\)