Class 4 Faithfulness and 4 Goodness had the same number of pupils. The ratio of the number of boys in 4 Faithfulness to the number of boys in 4 Goodness was 5 : 8. The ratio of the number of girls in 4 Faithfulness to the number of girls in 4 Goodness was 2 : 1.
- What is the ratio of the number of girls to the number of boys in Class 4 Faithfulness?
- If there were 25 fewer girls than boys in Class 4 Goodness, how many pupils were there each class?
Class 4 Faithfulness |
Class 4 Goodness |
1x11 = 11 u |
1x11 = 11 u |
Boys |
Girls |
Boys |
Girls |
5 |
2x3 |
8 |
1x3 |
5 u |
6 u |
8 u |
3 u |
(a)
Class 4 Faithfulness
Girls : Boys
5 : 6
(b)
Number of fewer girls than boys in Class 4 Goodness
= 8 u - 3 u
= 5 u
5 u = 25
1 u = 25 ÷ 5 = 5
Number of pupils in each class
= 11 u
= 11 x 5
= 55
Answer(s): (a) 5 : 6; (b) 55