2n boys are randomly divided into two subgroups containing n boys each. The probability that the two tallest boys are in different groups is

If 15 boys of different ages are distributed into 3 groups of 4,5, and 6 boys randomly then the probability that three youngest boys are in different groups is

10 boys and 2 girls are divided into 3 groups of 4 each.The probability that the girls will be in different groups 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

A group of 2n boys and 2n girls is randomly divided into two equal groups.The probability that each group contains the same number of boys and girls is (A) 1/2 (B) 1/n (c) 1/2n (D) None of these

A parents has two children. If one of them is boy, then the probability that other is, also a boy is

A family has two children. If one of them is boy, then the probability that other is also a boy, is

If n toys are distributed among N boys randomly, then the probability that a particular boy gets r(lt n) toys is