Question

In the class of 60 children,30% are girls . how many boy are there

Answer 1

Number of children = 60

Percentage of girls = 30%

Percentage of boys = 100 - 30 = 70%

Number of boys = 70% x 60 = 0.7 x 60 = 42 boys

Answer: There are 42 boys.

Answer 2

given

number of children = 60

girls = 30%

60x30/100 = 1800/100 = 18 .

number of girls = 18.

number of boys = 60 - 18 = 42 .

hence , number of boys = 42.