The ratio of the number of girls to the number of boys is 3 : 5.
Each girl is given 9 stickers.
Each boy is given 5 stickers.
The total number of stickers is 312.
- How many children are there?
- How many more boys than girls are there?
- How many more stickers are given to the girls than the boys?
|
Girls |
Boys |
Number |
3 u |
5 u |
Stickers for each person |
9 |
5 |
Total stickers |
27 u |
25 u |
(a)
Total number of stickers
= 27 u + 25 u
= 52 u
52 u = 312
1 u = 312 ÷ 52 = 6
Number of children
= 3 u + 5 u
= 8 u
= 8 x 6
= 48
(b)
Number of more boys than girls
= 5 u - 3 u
= 2 u
= 2 x 6
= 12
(c)
Number of more stickers given to the girls than boys
= 27 u - 25 u
= 2 u
= 2 x 6
= 12
Answer(s): (a) 48; (b) 12; (c) 12