Question

In a class of 35 students, the number of girls is 2/5 of the boys. Find the number of girls in the class.​

Answer 1

Answer:

numbers of boys=x. (say)

numbers of girls=2x/5

now, x+2x/5=35

x=25

Answer 2

$let \: the \: number \: of \: boys \: in \: the \: class \: be \: x \\ and \: the \: girls \: be \: 2 \div 5x \\ x + 2 \div5 = 35 \\ 5x + 2x = 35 \times 5 \\ 7x = 175 \\ x = 25 \\ so \: the \: no. \: of \: girls \: is \: 2 \div 5 \times 25 \: which \: is \: 10$

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