The ratio of the number of girls to the number of boys is 5 : 7.
Each girl is given 9 stickers.
Each boy is given 3 stickers.
The total number of stickers is 264.
- 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 |
5 u |
7 u |
Stickers for each person |
9 |
3 |
Total stickers |
45 u |
21 u |
(a)
Total number of stickers
= 45 u + 21 u
= 66 u
66 u = 264
1 u = 264 ÷ 66 = 4
Number of children
= 5 u + 7 u
= 12 u
= 12 x 4
= 48
(b)
Number of more boys than girls
= 7 u - 5 u
= 2 u
= 2 x 4
= 8
(c)
Number of more stickers given to the girls than boys
= 45 u - 21 u
= 24 u
= 24 x 4
= 96
Answer(s): (a) 48; (b) 8; (c) 96