Class 5 Joy and 5 Love had the same number of children. The ratio of the number of boys in 5 Joy to the number of boys in 5 Love was 7 : 11. The ratio of the number of girls in 5 Joy to the number of girls in 5 Love was 2 : 1.
- What is the ratio of the number of girls to the number of boys in Class 5 Joy?
- If there were 28 fewer girls than boys in Class 5 Love, how many children were there each class?
Class 5 Joy |
Class 5 Love |
1x15 = 15 u |
1x15 = 15 u |
Boys |
Girls |
Boys |
Girls |
7 |
2x4 |
11 |
1x4 |
7 u |
8 u |
11 u |
4 u |
(a)
Class 5 Joy
Girls : Boys
7 : 8
(b)
Number of fewer girls than boys in Class 5 Love
= 11 u - 4 u
= 7 u
7 u = 28
1 u = 28 ÷ 7 = 4
Number of children in each class
= 15 u
= 15 x 4
= 60
Answer(s): (a) 7 : 8; (b) 60