Question

The ratio of girls to boys in school is 2:7.If the number of boys is 630 . Find the number of girls .

Answer 1

Answer:

180

Step-by-step explanation:

The number of girls in the school is 18

Step-by-step explanation:

In the given problem,we have to find the number of girls in the school

We have,The ratio of girls to boys in the school is 2:7

Let, the number of girls in the school is 2x and the number of boys in the school is 7x , (where x is some proportionality constant)

Now,given that the number of boys in the school is 630

Then, by given condition,we get,

7x = 630

=> x = 630/7

=> x = 90

Hence, the number of boys in the school is (7×90) = 630

Hence, the number of girls in the school is (2×90) = 180