Out of 143 girls of a school, the ratio of the numbers of girls who can only sing and those who can dance is ` 9 : 2`. If 3 more girls were found to sing, then find the new ratio of the girls who can sing and those who can dance.

Out of 143 girls of school, the ratio of the number of girls who can sing and those who cnan dance is 9 : 2 . If 3 more girls were found to Sing, then let's find the new ratio of girls who can sing and those who can dance.

The number of ways in which 5 boys and 3 girls can be seated in a row so that each girl is beween two boys, is-

Find the number of ways in which 5 girls and 5 boys can be arranged in a row if boys and girls are alternative.

Find the number of ways in which 6 boys and 6 girls can be seated in a row so that all the girls sit together and all the boys sit together.

The ratio of boys and girls in Suchitra's class is 4 : 3 . If the total number of students in class is 63, find the number of boys and girls in the class. After a few days 3 more girls joined the class. Calculate the present ratio of boys and girls in Suchitra's class.

Out of 8 sailors on a boat, 3 can work only on one particular side and 2 only on the other side. Find the number of ways in which the sailors can be arranged on the boat.

A committee of 7 has to be formed from 9 boys and 4 girls .In how many can this be done when the committee consists of at most 3 girls

In how many ways three girls and nine boys can be seated in two vans , each having numbered seats , 3 in the front and 4 at the back .

Consider a class of 5 girls and 7 boys. The number of different teams consisting of 2 girls and 3 boys that can be formed from this class, if there are two specific boys A and B, who refuse to be the members of the same team, is