Class 5 Peace and 5 Gentleness had the same number of children. The ratio of the number of girls in 5 Peace to the number of girls in 5 Gentleness was 3 : 11. The ratio of the number of boys in 5 Peace to the number of boys in 5 Gentleness was 5 : 1.
- What is the ratio of the number of boys to the number of girls in Class 5 Peace?
- If there were 36 fewer boys than girls in Class 5 Gentleness, how many children were there each class?
Class 5 Peace |
Class 5 Gentleness |
1x13 = 13 u |
1x13 = 13 u |
Girls |
Boys |
Girls |
Boys |
3 |
5x2 |
11 |
1x2 |
3 u |
10 u |
11 u |
2 u |
(a)
Class 5 Peace
Boys : Girls
3 : 10
(b)
Number of fewer boys than girls in Class 5 Gentleness
= 11 u - 2 u
= 9 u
9 u = 36
1 u = 36 ÷ 9 = 4
Number of children in each class
= 13 u
= 13 x 4
= 52
Answer(s): (a) 3 : 10; (b) 52