Question

In a group of 60 children there are 3 times as many boys as girls how many girls are there

Answer 1

there are 15 girls. 15 times 3 is 45 and 45 plus 15 equals 60

Answer 2

Well, there are 60 children. And 3 boys for every 1 girl.
3:1
3 + 1 = 4
60/4 = 15
15 x 1 = 15
There were 15 girls in the class and 45 boys.