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`

Three boys and two girls stand in a queue. The probability, that the number of boys ahead of every girls is at least one more then the number of girls ahead of her, is-

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.

In a class of 65 students, the ratio of girls and boys is 3: 2, then the number of girls are

Find the probability that in a family of 4 children there will be at least 1 boy and 1 girl.

The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is (a) 1 : 2 (b) 2 : 3 (c) 3 : 4 (d) 3 : 5

Total number of boys and girls in a class is 52. If the number of girls is 10 more than that of boys, find the number of boys.