Class 3 Gentleness and 3 Goodness had the same number of students. The ratio of the number of boys in 3 Gentleness to the number of boys in 3 Goodness was 1 : 11. The ratio of the number of girls in 3 Gentleness to the number of girls in 3 Goodness was 6 : 1.
- What is the ratio of the number of girls to the number of boys in Class 3 Gentleness?
- If there were 36 fewer girls than boys in Class 3 Goodness, how many students were there each class?
Class 3 Gentleness |
Class 3 Goodness |
1x13 = 13 u |
1x13 = 13 u |
Boys |
Girls |
Boys |
Girls |
1 |
6x2 |
11 |
1x2 |
1 u |
12 u |
11 u |
2 u |
(a)
Class 3 Gentleness
Girls : Boys
1 : 12
(b)
Number of fewer girls than boys in Class 3 Goodness
= 11 u - 2 u
= 9 u
9 u = 36
1 u = 36 ÷ 9 = 4
Number of students in each class
= 13 u
= 13 x 4
= 52
Answer(s): (a) 1 : 12; (b) 52