Class 5 Peace and 5 Faithfulness had the same number of children. The ratio of the number of boys in 5 Peace to the number of boys in 5 Faithfulness was 11 : 15. The ratio of the number of girls in 5 Peace to the number of girls in 5 Faithfulness was 2 : 1.
- What is the ratio of the number of girls to the number of boys in Class 5 Peace?
- If there were 33 fewer girls than boys in Class 5 Faithfulness, how many children were there each class?
Class 5 Peace |
Class 5 Faithfulness |
1x19 = 19 u |
1x19 = 19 u |
Boys |
Girls |
Boys |
Girls |
11 |
2x4 |
15 |
1x4 |
11 u |
8 u |
15 u |
4 u |
(a)
Class 5 Peace
Girls : Boys
11 : 8
(b)
Number of fewer girls than boys in Class 5 Faithfulness
= 15 u - 4 u
= 11 u
11 u = 33
1 u = 33 ÷ 11 = 3
Number of children in each class
= 19 u
= 19 x 3
= 57
Answer(s): (a) 11 : 8; (b) 57