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A committee of 4 students is selected at random from a group consisting of 7 boys and 5 girls.Find the probability that there are exactly 2 boys in the committee,given that at least one girl must be there in the committee.

There are three boys and two girls. A committee of two is to be formed. Find the probability of the following events. (a) Eevnt A : The committee contain at least one girl. (b) Event B : The committee contains one boy and one girl.

A committee of 4 students is selected from a group of 8 boys and 4 girls. Given that there is at least one girl in the committee. Find probability of an event that there are exactly 2 girls in the committee.

A committee of 4 students is selected at random from a group consisting 8 boys and 4 girls. Given that there is at least one girl in the committee, calculate the probability that there are exactly 2 girls in the committee.

A committee of 4 students is selected at random from a grourp consisting of 8 boys and 4 girls.Given that there is at least one girl in the committee,calculate the probability that there are exactly 2 girls in the committee.

A committee of 4 students is selected at random from a grourp consisting of 8 boys and 4 girls. Given that there is at least one girl in the committee, calculate the probability that there are exactly 2 girls in the committee.

4 girls and 4 boys sit in a row. Find the probability the boys and girls sit in alternate seats.

There are three boys and two girls. A committee of two is to be formed. Find the probability of the following events: Event A : The committee contains at least one boy. Event B : The committee contains one boy and one girl.