The ratio of girls to boys in a school is $5 : 3.$ If there are $300$ girls, find the number of boys.

210

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180

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240

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150

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Solution

The correct option is B: $180$
Given: Ratio of girls to boys $= 5 : 3$
And, the number of girls $= 300$

Let girls be $5 x$ and boys be $3 x$

$∴ 5 x = 300$ ( Given )

$\Rightarrow x = \frac{300}{5} = 60$

$∴$ Number of boys $= 3 x = 3 \times 60 = 180$

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The ratio of girls to boys in a school is 5:3. If there are 300 girls, find the number of boys.

The correct option is B: 180 Given: Ratio of girls to boys =5:3And, the number of girls =300 Let girls be 5x and boys be 3x ∴5x=300 ( Given ) ⇒x=3005=60 ∴ Number of boys =3x=3×60=180

The ratio of girls to boys in a school is $5 : 3.$ If there are $300$ girls, find the number of boys.

The correct option is B: $180$
Given: Ratio of girls to boys $= 5 : 3$
And, the number of girls $= 300$

Let girls be $5 x$ and boys be $3 x$

$∴ 5 x = 300$ ( Given )

$\Rightarrow x = \frac{300}{5} = 60$

$∴$ Number of boys $= 3 x = 3 \times 60 = 180$