Class 6 Peace and 6 Patience had the same number of students. The ratio of the number of girls in 6 Peace to the number of girls in 6 Patience was 5 : 13. The ratio of the number of boys in 6 Peace to the number of boys in 6 Patience was 3 : 1.
- What is the ratio of the number of boys to the number of girls in Class 6 Peace?
- If there were 18 fewer boys than girls in Class 6 Patience, how many students were there each class?
Class 6 Peace |
Class 6 Patience |
1x17 = 17 u |
1x17 = 17 u |
Girls |
Boys |
Girls |
Boys |
5 |
3x4 |
13 |
1x4 |
5 u |
12 u |
13 u |
4 u |
(a)
Class 6 Peace
Boys : Girls
5 : 12
(b)
Number of fewer boys than girls in Class 6 Patience
= 13 u - 4 u
= 9 u
9 u = 18
1 u = 18 ÷ 9 = 2
Number of students in each class
= 17 u
= 17 x 2
= 34
Answer(s): (a) 5 : 12; (b) 34