The ratio of the number of girls to the number of boys is 2 : 5.
Each girl is given 6 stickers.
Each boy is given 2 stickers.
The total number of stickers is 66.
- 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 |
2 u |
5 u |
Stickers for each person |
6 |
2 |
Total stickers |
12 u |
10 u |
(a)
Total number of stickers
= 12 u + 10 u
= 22 u
22 u = 66
1 u = 66 ÷ 22 = 3
Number of children
= 2 u + 5 u
= 7 u
= 7 x 3
= 21
(b)
Number of more boys than girls
= 5 u - 2 u
= 3 u
= 3 x 3
= 9
(c)
Number of more stickers given to the girls than boys
= 12 u - 10 u
= 2 u
= 2 x 3
= 6
Answer(s): (a) 21; (b) 9; (c) 6