Class 1 Patience and 1 Joy had the same number of children. The ratio of the number of boys in 1 Patience to the number of boys in 1 Joy was 7 : 15. The ratio of the number of girls in 1 Patience to the number of girls in 1 Joy was 5 : 1.
- What is the ratio of the number of girls to the number of boys in Class 1 Patience?
- If there were 39 fewer girls than boys in Class 1 Joy, how many children were there each class?
Class 1 Patience |
Class 1 Joy |
1x17 = 17 u |
1x17 = 17 u |
Boys |
Girls |
Boys |
Girls |
7 |
5x2 |
15 |
1x2 |
7 u |
10 u |
15 u |
2 u |
(a)
Class 1 Patience
Girls : Boys
7 : 10
(b)
Number of fewer girls than boys in Class 1 Joy
= 15 u - 2 u
= 13 u
13 u = 39
1 u = 39 ÷ 13 = 3
Number of children in each class
= 17 u
= 17 x 3
= 51
Answer(s): (a) 7 : 10; (b) 51