In a group of 48 children, there are twice as many boys as girls. How many girls are there?

There are three groups. One group for girls. One group for half the boys which is equal to one group of girls and another identical sized group of boys because there are twice as many boys as girls.

48=total

3=number of groups

48/3=16

16 is equal to the number of girls because it is equal to half the number of boys

16*2=32

32+16=48

Number of boys plus number number of girls: 32+16=48