Class 5 Peace and 5 Joy had the same number of children. The ratio of the number of girls in 5 Peace to the number of girls in 5 Joy was 5 : 11. The ratio of the number of boys in 5 Peace to the number of boys in 5 Joy was 3 : 1.
- What is the ratio of the number of boys to the number of girls in Class 5 Peace?
- If there were 32 fewer boys than girls in Class 5 Joy, how many children were there each class?
Class 5 Peace |
Class 5 Joy |
1x14 = 14 u |
1x14 = 14 u |
Girls |
Boys |
Girls |
Boys |
5 |
3x3 |
11 |
1x3 |
5 u |
9 u |
11 u |
3 u |
(a)
Class 5 Peace
Boys : Girls
5 : 9
(b)
Number of fewer boys than girls in Class 5 Joy
= 11 u - 3 u
= 8 u
8 u = 32
1 u = 32 ÷ 8 = 4
Number of children in each class
= 14 u
= 14 x 4
= 56
Answer(s): (a) 5 : 9; (b) 56