There are 1600 pupils in a school.

20% of the pupils are in Year 9.
35% of the Year 9 pupils are boys.
How many Year 9 boys are there in the school?

1 answer

First, we need to find how many pupils are in Year 9:

20% of 1600 pupils = 0.20 x 1600 = 320 pupils in Year 9

Next, we need to find how many of the Year 9 pupils are boys:

35% of 320 pupils = 0.35 x 320 = 112 Year 9 boys

Therefore, there are 112 Year 9 boys in the school.