Discussion

Question:

A school has a student population of 560. The number of girls is 14 $\frac{2}{7}$ % of the number of boys. How many girls are in the school?

Explanation:

Let the number of boys be b.

Hence, the number of girls is b/7 (14 $\frac{2}{7}$ % = $\frac{1}{7}$ )

Then, from the problem,

$\frac{b}{7}$ + b = 560

⇒ 8b/7 = 560

⇒ b = 490

⇒ No. of girls = 560 – 490 = 70

Hence, option (b).

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