Question

There are 18 girls in a class and the ratio of the number of girls and boys in the class is 3:2. Find the number of boys.

Answer 1

Answer:

12

Step-by-step explanation:

Multiply to get the number of girls they've given you.

3 x 6 = 18 girls.

2 x 6 = 12 boys.

Answer 2

Answer:

Number of boys = 12

Step-by-step explanation:

Let the total number of children in the class be x

Number of girls = 18

Number of boys = x - 18

Ratio of girls and boys = 3 : 2

Sum of the ratio = 5

Find the value of x

$\frac{3}{5 } \times x = 18\\\\3 \times x = 18 \times 5\\\\x = \frac{90}{3} = 30$

Therefore, total number of children in the class = 30

Hence number of boys  = x - 18 = 30 - 18 = 12