The ratio of boys and girls in a school is 8 : 3. If the total number of girls be 375, find the number of boys in the school.

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Solution

Suppose that the number of boys is x.
Then, x : 375 = 8 : 3

⇒ x = $\frac{8 \times 375}{3} = 8 \times 125$ = 1000

Hence, the number of girls in the school is 1000.

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