Question

If the ratio of boys to girls in a term is 2:3and there are 18 girls, how many boys are there?​

Answer 1

Answer:

Let the total number of students=100

Ratio of boys and girls=2:3

2+3=5

No. of boys =

5

2

×100=40

No. of girls=

5

3

×100=60

If 20% of the boys leaves the class then 20% of 40

100

20

×40=8

Now number of boys=40−8=32

New ratio=32:60⇒8:15

Answer 2

According to the question , boys : girls = 2:3

Given that girls are 18.

So let's consider that number of boys and number of girls are a multiple of a common number , 'x' .

So according to the given ratio and our assumption , 3x = 18.

Therefore x = 6.

Similarly , 2x = 12 , which gives us the number of girls in the class.

HOPE IT. HELPS:))