Question

A committee of 7 has to b formedfrom 9 boys and 4 girls.In how many ways can this be done when the commiytee conist of exactly 3 girls

Answer 1

Choose 3 girls: 4C3 =>4 ways

Choose 4 boys : 9C4 => 126 ways

=> there are 130 ways to form a committee of 7 which consist 3 girls