# Question #5fe42

May 16, 2017

There are $12 b o y s \mathmr{and} 8 g i r l s$.

#### Explanation:

When you start with a ratio of a total sum, you are given the fraction of the total sum that each component takes up or occupies.

In this case, the ratio is 3B:2G which is also $3 + 2 = 5$ or $\frac{5}{5} \cdot 20$

So for boys: $3 \frac{B}{\cancel{5}} \cdot \cancel{20} 4 = 3 B \cdot 4 = 12 B$

And for girls: $2 \frac{G}{\cancel{5}} \cdot \cancel{20} 4 = 2 G \cdot 4 = 8 G$

Total students: $12 B + 8 G = 20$