Class 4 Kindness and 4 Gentleness had the same number of students. The ratio of the number of girls in 4 Kindness to the number of girls in 4 Gentleness was 1 : 10. The ratio of the number of boys in 4 Kindness to the number of boys in 4 Gentleness was 4 : 1.
- What is the ratio of the number of boys to the number of girls in Class 4 Kindness?
- If there were 28 fewer boys than girls in Class 4 Gentleness, how many students were there each class?
Class 4 Kindness |
Class 4 Gentleness |
1x13 = 13 u |
1x13 = 13 u |
Girls |
Boys |
Girls |
Boys |
1 |
4x3 |
10 |
1x3 |
1 u |
12 u |
10 u |
3 u |
(a)
Class 4 Kindness
Boys : Girls
1 : 12
(b)
Number of fewer boys than girls in Class 4 Gentleness
= 10 u - 3 u
= 7 u
7 u = 28
1 u = 28 ÷ 7 = 4
Number of students in each class
= 13 u
= 13 x 4
= 52
Answer(s): (a) 1 : 12; (b) 52