Boys and girls 8

In a class of 35 boys and girls that has a ratio of 2:5, 5 boys are absent and 5 boys are present. How many students are present?

Correct answer:

x =  30

Step-by-step explanation:

$$\begin{gathered} b:g=2:5 \\ b+g=35 \\ 2\mathrm{/}5\cdot g+g=35 \\ 7g=175 \\ g=25 \\ b=35-g=35-25=10 \\ x=g+5=25+5=30 \end{gathered}$$

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