Question

in a class of 40 students,15% are boys .find the ratio of the number of boys and girls​

Answer 1

$\: \: \: \: \: \: \: \: \: \sf{total \: students \: = 40}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \sf{boys \: = 15\% \: of \: 40}$

$\: \: \: \: \: \: \: \: \sf{no \: of \: boys \: = \frac{15}{10 \cancel{0}} \times 4 \cancel{0}} = {\bold \purple{6}}$

$\sf{ girls \: = total \: students \: - no \: of \: boys \: }$

$= > \: \: \: \: \: \: \: \: \: \sf{ 40 - 6 = \bold \blue{34}}$

$\: \: \: \: \: \: \: \: \sf \green{ratio \: of \: no \: of \: boys \: to \: girls}$

$\: \: \: \: \: \: \: \: \: \sf{boys : \: girls = 6 : 34}$

$\: \: \: \: \: \: \: \: \sf{boys \: : \: girls = \pink{3 : 17}}$

Answer 2

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