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The ratio of boys to girls in the Science Club is 3:5. If there are 60 girls, how many boys are there?

1 Answer

Nov 18, 2016

$36 boys$ $36" boys"$

Explanation:

Express the ratio in fractional form.

Let the number of boys be x.

$\Rightarrow \frac{3}{5} = \frac{x}{60}$ $rArr3/5=x/60$

cross-multiply.

$\Rightarrow 5 x = 180$ $rArr5x=180$

$\Rightarrow x = \frac{180}{5} = 36$ $rArrx=180/5=36$

There are 36 boys in the Science Club

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