Class 4 Kindness and 4 Faithfulness had the same number of pupils. The ratio of the number of girls in 4 Kindness to the number of girls in 4 Faithfulness was 5 : 11. The ratio of the number of boys in 4 Kindness to the number of boys in 4 Faithfulness was 4 : 1.
- What is the ratio of the number of boys to the number of girls in Class 4 Kindness?
- If there were 18 fewer boys than girls in Class 4 Faithfulness, how many pupils were there each class?
Class 4 Kindness |
Class 4 Faithfulness |
1x13 = 13 u |
1x13 = 13 u |
Girls |
Boys |
Girls |
Boys |
5 |
4x2 |
11 |
1x2 |
5 u |
8 u |
11 u |
2 u |
(a)
Class 4 Kindness
Boys : Girls
5 : 8
(b)
Number of fewer boys than girls in Class 4 Faithfulness
= 11 u - 2 u
= 9 u
9 u = 18
1 u = 18 ÷ 9 = 2
Number of pupils in each class
= 13 u
= 13 x 2
= 26
Answer(s): (a) 5 : 8; (b) 26