The ratio

The ratio of girls to boys in Mrs. White's class is 3:2.  If there are 12 boys, how many girls are in the class room?

Correct answer:

g =  18

Step-by-step explanation:

$$\begin{gathered} b=12 \\ g:b=3:2 \\ g={\displaystyle \frac{3}{2}}\cdot b={\displaystyle \frac{3}{2}}\cdot 12=18 \end{gathered}$$

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