Class 5 Peace and 5 Faithfulness had the same number of students. The ratio of the number of boys in 5 Peace to the number of boys in 5 Faithfulness was 1 : 9. The ratio of the number of girls in 5 Peace to the number of girls in 5 Faithfulness was 5 : 1.
- What is the ratio of the number of girls to the number of boys in Class 5 Peace?
- If there were 35 fewer girls than boys in Class 5 Faithfulness, how many students were there each class?
Class 5 Peace |
Class 5 Faithfulness |
1x11 = 11 u |
1x11 = 11 u |
Boys |
Girls |
Boys |
Girls |
1 |
5x2 |
9 |
1x2 |
1 u |
10 u |
9 u |
2 u |
(a)
Class 5 Peace
Girls : Boys
1 : 10
(b)
Number of fewer girls than boys in Class 5 Faithfulness
= 9 u - 2 u
= 7 u
7 u = 35
1 u = 35 ÷ 7 = 5
Number of students in each class
= 11 u
= 11 x 5
= 55
Answer(s): (a) 1 : 10; (b) 55