Class 4 Kindness and 4 Peace had the same number of pupils. The ratio of the number of girls in 4 Kindness to the number of girls in 4 Peace was 5 : 8. The ratio of the number of boys in 4 Kindness to the number of boys in 4 Peace was 2 : 1.
- What is the ratio of the number of boys to the number of girls in Class 4 Kindness?
- If there were 25 fewer boys than girls in Class 4 Peace, how many pupils were there each class?
Class 4 Kindness |
Class 4 Peace |
1x11 = 11 u |
1x11 = 11 u |
Girls |
Boys |
Girls |
Boys |
5 |
2x3 |
8 |
1x3 |
5 u |
6 u |
8 u |
3 u |
(a)
Class 4 Kindness
Boys : Girls
5 : 6
(b)
Number of fewer boys than girls in Class 4 Peace
= 8 u - 3 u
= 5 u
5 u = 25
1 u = 25 ÷ 5 = 5
Number of pupils in each class
= 11 u
= 11 x 5
= 55
Answer(s): (a) 5 : 6; (b) 55