Question

in class of 35 student girla are 2/ 5 of boys find the no. of girl​

Answer 1

$Let\ no . \ girls =x\\\\Then\ no. \ boys =\frac{2}{5} (x)\\\\So\ x+\frac{2}{5} (x)=35\\\\ =\frac{7x}{5} =35\\\\ =7x=35*5\\\\ =x=35*\frac{5}{7} \\\\ x = 5*5\\\\ x =25\\\\ Number\ of\ girls=x= 25 \\\\Number\ of\ boys=10$