Class 3 Gentleness and 3 Kindness had the same number of children. The ratio of the number of boys in 3 Gentleness to the number of boys in 3 Kindness was 1 : 5. The ratio of the number of girls in 3 Gentleness to the number of girls in 3 Kindness was 3 : 1.
- What is the ratio of the number of girls to the number of boys in Class 3 Gentleness?
- If there were 12 fewer girls than boys in Class 3 Kindness, how many children were there each class?
Class 3 Gentleness |
Class 3 Kindness |
1x7 = 7 u |
1x7 = 7 u |
Boys |
Girls |
Boys |
Girls |
1 |
3x2 |
5 |
1x2 |
1 u |
6 u |
5 u |
2 u |
(a)
Class 3 Gentleness
Girls : Boys
1 : 6
(b)
Number of fewer girls than boys in Class 3 Kindness
= 5 u - 2 u
= 3 u
3 u = 12
1 u = 12 ÷ 3 = 4
Number of children in each class
= 7 u
= 7 x 4
= 28
Answer(s): (a) 1 : 6; (b) 28