The ratio of girls to boys in a hall is 7 : 8. If there are 1080 students in the hall, how many boys are there?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 576
In the ratio 7 : 8 the whole hall is \(7+8=15\) parts and the boys are 8 of those parts.
1 part \(\displaystyle =\frac{1080}{15}=72\)
Boys \(=8\times72=576\)
Check: girls \(=7\times72=504\), and \(504+576=1080\)
There are 576 boys in the hall.