Question

In a class of 35 students,tue number of girls is two fifthof the number of boys . find the number of girls in yhe class

Answer 1

35÷5=7. 2/5 means 2/5×35=14.so,the no of girls in the class are 14.

Answer 2

$let \: no. \: of \: boys \: be \: x \\ therefore girls \: will be \: \frac{2}{5} \\ total \: no \: is35 \\ therefore \\ x + \frac{2}{5}x = 35 \\ \: \frac{5x + 2x}{5} = 35 \\ \frac{7x}{5} = 35 \\ \frac{x}{5} = 5 \\ x = 25 \\ no. \: of \: boys \: = 25 \\ no. \: of \: girls = 10$
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