Class 4 Goodness and 4 Peace had the same number of students. The ratio of the number of boys in 4 Goodness to the number of boys in 4 Peace was 1 : 15. The ratio of the number of girls in 4 Goodness to the number of girls in 4 Peace was 8 : 1.
- What is the ratio of the number of girls to the number of boys in Class 4 Goodness?
- If there were 39 fewer girls than boys in Class 4 Peace, how many students were there each class?
Class 4 Goodness |
Class 4 Peace |
1x17 = 17 u |
1x17 = 17 u |
Boys |
Girls |
Boys |
Girls |
1 |
8x2 |
15 |
1x2 |
1 u |
16 u |
15 u |
2 u |
(a)
Class 4 Goodness
Girls : Boys
1 : 16
(b)
Number of fewer girls than boys in Class 4 Peace
= 15 u - 2 u
= 13 u
13 u = 39
1 u = 39 ÷ 13 = 3
Number of students in each class
= 17 u
= 17 x 3
= 51
Answer(s): (a) 1 : 16; (b) 51