Class 5 Faithfulness and 5 Gentleness had the same number of children. The ratio of the number of girls in 5 Faithfulness to the number of girls in 5 Gentleness was 1 : 9. The ratio of the number of boys in 5 Faithfulness to the number of boys in 5 Gentleness was 5 : 1.
- What is the ratio of the number of boys to the number of girls in Class 5 Faithfulness?
- If there were 28 fewer boys than girls in Class 5 Gentleness, how many children were there each class?
Class 5 Faithfulness |
Class 5 Gentleness |
1x11 = 11 u |
1x11 = 11 u |
Girls |
Boys |
Girls |
Boys |
1 |
5x2 |
9 |
1x2 |
1 u |
10 u |
9 u |
2 u |
(a)
Class 5 Faithfulness
Boys : Girls
1 : 10
(b)
Number of fewer boys than girls in Class 5 Gentleness
= 9 u - 2 u
= 7 u
7 u = 28
1 u = 28 ÷ 7 = 4
Number of children in each class
= 11 u
= 11 x 4
= 44
Answer(s): (a) 1 : 10; (b) 44