Class 1 Love and 1 Faithfulness had the same number of pupils. The ratio of the number of boys in 1 Love to the number of boys in 1 Faithfulness was 9 : 11. The ratio of the number of girls in 1 Love to the number of girls in 1 Faithfulness was 2 : 1.
- What is the ratio of the number of girls to the number of boys in Class 1 Love?
- If there were 27 fewer girls than boys in Class 1 Faithfulness, how many pupils were there each class?
Class 1 Love |
Class 1 Faithfulness |
1x13 = 13 u |
1x13 = 13 u |
Boys |
Girls |
Boys |
Girls |
9 |
2x2 |
11 |
1x2 |
9 u |
4 u |
11 u |
2 u |
(a)
Class 1 Love
Girls : Boys
9 : 4
(b)
Number of fewer girls than boys in Class 1 Faithfulness
= 11 u - 2 u
= 9 u
9 u = 27
1 u = 27 ÷ 9 = 3
Number of pupils in each class
= 13 u
= 13 x 3
= 39
Answer(s): (a) 9 : 4; (b) 39