Question

The ratio of boys to girls in a school is 9 : 11. If there are 400 pupils in the school, how many boys are there?

Answer 1

180 boys

Explanation:

If there is a ratio of 9 boys : 11 girls

9 + 11 = 20 total

And if there are 400 students total in the school

400/20 = 20.

9 * 20 = 180

11 * 20 = 220

So the ratio of 400 pupils would now be 180 boys: 220 girls