Question

In a certain classroom, the ratio of boys to girls is 2 to 1. If there are 39 students in the classroom, how many are boys?

Answer 1

26 boys

Explanation:

boys : girls = 2 : 1

If girls = x, than boys = 2x.

Altogether girls and boys = (x+2x) = 3x

Altogether girls and boys = 39

3x = 39

x = 39/3 = 13 (girls)

2x = (2*13) = 26 (boys)