Class 2 Kindness and 2 Gentleness had the same number of pupils. The ratio of the number of girls in 2 Kindness to the number of girls in 2 Gentleness was 1 : 13. The ratio of the number of boys in 2 Kindness to the number of boys in 2 Gentleness was 7 : 1.
- What is the ratio of the number of boys to the number of girls in Class 2 Kindness?
- If there were 33 fewer boys than girls in Class 2 Gentleness, how many pupils were there each class?
Class 2 Kindness |
Class 2 Gentleness |
1x15 = 15 u |
1x15 = 15 u |
Girls |
Boys |
Girls |
Boys |
1 |
7x2 |
13 |
1x2 |
1 u |
14 u |
13 u |
2 u |
(a)
Class 2 Kindness
Boys : Girls
1 : 14
(b)
Number of fewer boys than girls in Class 2 Gentleness
= 13 u - 2 u
= 11 u
11 u = 33
1 u = 33 ÷ 11 = 3
Number of pupils in each class
= 15 u
= 15 x 3
= 45
Answer(s): (a) 1 : 14; (b) 45