Question

In Grade 6, there are 3 girls for every 2 boys. If there are 30 girls in the class, how many boys are there in the class?

Answer 1

Answer:

20 boys are in the class

3×10= 30

2 is ten times =20

OK

Answer 2

There are 20 boys in the class.

It is given that, in Grade 6, there are 3 girls for every 2 boys.

So, we can represent the ratio of girls to boys as 3/2 = 3:2

Again, there are 30 girls in the class.

Let there be x number of boys in the class.

So, the ratio of girls to boys become = 30/x = 30:x.

This is equal to 3:2.

Thus, 30/x = 3/2

⇒3x = 60

⇒x = 60/3 = 20

Number of boys, x = 20.