From a group of boys and girls, 15 girls leave. There are then left 2 boys for each girl. After this, 45 boys leave. There are then 5 girls for each boy. Find the number of girls in the beginning.

In a group of boys and girls , 15 girls left the group , the ratio boys and girls becomes 2:1 . If after , 45 boys left the group , the ratio become 1 :5 Initially ,how many girls were there in the group ?

The ratio of boys and girls in a school is 5:3. If there are 115 boys, find the number of girls in the school.

From a group of 5 boys and 3 girls, three persons are chosen at random. Find the probability that there are more girls than boys

From a group of 5 boys and 3 girls, three persons are chosen at random. Find the probability that there are more girls than boys

There are 30 boys and 20 girls in a class. The ratio of the number of girls to the number of boys is

There are 20 girls and 15 boys in a class. What is the ratio of number of girls to the number of boys?