The ratio of boys to girls in a class room was 9:8. Half of the girls left the classroom, and then there were 15 more boys than girls.

Question

A. How many children were in the classroom in the beginning
B. How many girls left the classroom?

Answer 1

b/g = 9/8
b = g/2 + 15

So, to start with there were

27 boys and 24 girls

Answer 2

In class there are 72 student. If the number of boys is half of number of girls,how many girls and boys are there in the class?

Answer 3

There would be 100