Question

In a class of 35 students the number of girls are 2/5th of the boys . Find the number of girls

Answer 1

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In a class of 35 students the number of girls are 2/5th of the boys . Find the number of girls.

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$\tt \blue{ \to \: number \: of \: girls = 21}$

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$\tt{ \underbrace{given}}$

$\tt{total \: number \: of \: students = 35}$

$\tt{fraction \: of \: number \: of \: boys = \frac{2}{5} }$

$\tt{now}$

$\tt{ number \: of \: boys \: }$

$\tt{ = \frac{2}{5} \: of \: 35}$

$\tt{ = \frac{2}{ \cancel5} \times \cancel{35} }$

$\tt{ = 2 \times 7}$

$\tt{ = 14}$

$\tt{ \therefore \: number \: of \: girls \: will \: be}$

$\tt{ = 35 - 14}$

$\tt \red{ = 21}$