Question

In a class of 60 children, 30% are girls. How many boys are there?

Answer 1

Calculating the total number of girls

Given: Total number of children = 60

Total number of girls = 30% of the total number of children in class

$=30\%\text{of}60$

$=\frac{30}{100}\times 60$

$=\frac{1800}{100}$

$=18$

Calculating the total number of boys
Total number of boys = (Total children - Total number of girls)

= 60 - 18
= 42
Hence, there are 42 boys in the class.