Question

In a school of 900 pupils, 30% are boys and 40% of the boys wear glasses.

How many boys wear glasses?​

Answer 1

180

Explanation:

First, we have to find out how many boys are in the school:

900 * 0.30 = 270

Now, we know that there are 270 boys. Out of these boys we need to find out how many boys have glasses:

270 * 0.40 = 108

180 is our answer.