Class 4 Gentleness and 4 Patience had the same number of students. The ratio of the number of boys in 4 Gentleness to the number of boys in 4 Patience was 3 : 7. The ratio of the number of girls in 4 Gentleness to the number of girls in 4 Patience was 2 : 1.
- What is the ratio of the number of girls to the number of boys in Class 4 Gentleness?
- If there were 15 fewer girls than boys in Class 4 Patience, how many students were there each class?
Class 4 Gentleness |
Class 4 Patience |
1x11 = 11 u |
1x11 = 11 u |
Boys |
Girls |
Boys |
Girls |
3 |
2x4 |
7 |
1x4 |
3 u |
8 u |
7 u |
4 u |
(a)
Class 4 Gentleness
Girls : Boys
3 : 8
(b)
Number of fewer girls than boys in Class 4 Patience
= 7 u - 4 u
= 3 u
3 u = 15
1 u = 15 ÷ 3 = 5
Number of students in each class
= 11 u
= 11 x 5
= 55
Answer(s): (a) 3 : 8; (b) 55