Class 2 Peace and 2 Faithfulness had the same number of students. The ratio of the number of boys in 2 Peace to the number of boys in 2 Faithfulness was 1 : 7. The ratio of the number of girls in 2 Peace to the number of girls in 2 Faithfulness was 4 : 1.
- What is the ratio of the number of girls to the number of boys in Class 2 Peace?
- If there were 10 fewer girls than boys in Class 2 Faithfulness, how many students were there each class?
Class 2 Peace |
Class 2 Faithfulness |
1x9 = 9 u |
1x9 = 9 u |
Boys |
Girls |
Boys |
Girls |
1 |
4x2 |
7 |
1x2 |
1 u |
8 u |
7 u |
2 u |
(a)
Class 2 Peace
Girls : Boys
1 : 8
(b)
Number of fewer girls than boys in Class 2 Faithfulness
= 7 u - 2 u
= 5 u
5 u = 10
1 u = 10 ÷ 5 = 2
Number of students in each class
= 9 u
= 9 x 2
= 18
Answer(s): (a) 1 : 8; (b) 18