Three boys and two girls stand in a queue. The probability, that the number of boys ahead is at least one more than the number of girls ahead of her, is (A) `1/2` (B) `1/3` (C) `2/3` (D) `3/4`

Four boys and three girls stand in a queue for an interview,probability that they will in alternate position is

The number of boys and girls in a class are in the ratio 5:4. If the number of boys is 9 more than the number of girls, then number of boys is 9.

The number of boys and girls in a class are in the ratio 7:5. The number of boys is 8 more than the number of girls.What is the total class strength?

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

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