In one grade of 150 students, the ratio of boys to girls is 2 : 3.

How many boys are in that grade?

The numbers of boys in one grade are 60.

Step-by-step explanation:

As given

In one grade of 150 students.

The ratio of boys to girls is 2:3.

Let us assume that the scalar multiple of boys and girls be x.

Thus number of boys = 2x

Number of girls = 3x

Than the equations becomes

2x + 3x = 150

5x = 150

x = 30

Thus number of boys = 2 * 30

= 60

Therefore the numbers of boys in one grade are 60

150/boys=2/3

2 boys/450

boys=450/2

boys=225