Pupils 7

There are 40 pupils in a certain class. 3/5 of the class are boys. How many are girls?

Correct result:

g =  16

Solution:

$$\begin{gathered} t=40 \\ b={\displaystyle \frac{3}{5}}\cdot t={\displaystyle \frac{3}{5}}\cdot 40=24 \\ g=t-b=40-24=16 \end{gathered}$$

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