Class 3 Patience and 3 Faithfulness had the same number of students. The ratio of the number of boys in 3 Patience to the number of boys in 3 Faithfulness was 5 : 11. The ratio of the number of girls in 3 Patience to the number of girls in 3 Faithfulness was 4 : 1.
- What is the ratio of the number of girls to the number of boys in Class 3 Patience?
- If there were 27 fewer girls than boys in Class 3 Faithfulness, how many students were there each class?
Class 3 Patience |
Class 3 Faithfulness |
1x13 = 13 u |
1x13 = 13 u |
Boys |
Girls |
Boys |
Girls |
5 |
4x2 |
11 |
1x2 |
5 u |
8 u |
11 u |
2 u |
(a)
Class 3 Patience
Girls : Boys
5 : 8
(b)
Number of fewer girls than boys in Class 3 Faithfulness
= 11 u - 2 u
= 9 u
9 u = 27
1 u = 27 ÷ 9 = 3
Number of students in each class
= 13 u
= 13 x 3
= 39
Answer(s): (a) 5 : 8; (b) 39