from a total of 5 boys and 5 girls , how many 4 - person committees can be selected if the committee must have exactly 2 boys and 2 girls ?
"answer = d = 100 no of 4 person committees that can be formed = 5 c 2 * 5 c 2 = 100 answer d"
multiply(multiply(const_3, 5), multiply(5, 2))