The number of ways of dividing 12 boys into 2 groups of 7,5 boys respectively is

Find the number of ways of selecting 4 boys and 3 girls from a group of 8 boys and 5 girls.

The number of ways of arranging 20 boys so that 3 particular boys are separated is:

The number of ways of arranging 20 boys so that 3 particular boys are separated is:

The number of ways in which 10 boys can be divied into 2 groups of 5, such that two tallest boys are in two different groups, is equal to

The number of ways in which 10 boys can be divied into 2 groups of 5, such that two tallest boys are in two different groups, is equal to

Find the number of ways of arranging 5 boys and 5 girls around a circle.

Find the number of ways of arranging 5 boys and 5 girls around a circle ?

Find the number of ways of arranging 5 boys and 4 girls in a row, so that the row begins with a boy ends with a girl.