The ratio of the number of boys to the number of girls is 5 : 7.
Each boy is given 3 stickers.
Each girl is given 2 stickers.
The total number of stickers is 174.
- How many children are there?
- How many more girls than boys are there?
- How many more stickers are given to the boys than the girls?
|
Boys |
Girls |
Number |
5 u |
7 u |
Stickers for each person |
3 |
2 |
Total stickers |
15 u |
14 u |
(a)
Total number of stickers
= 15 u + 14 u
= 29 u
29 u = 174
1 u = 174 ÷ 29 = 6
Number of children
= 5 u + 7 u
= 12 u
= 12 x 6
= 72
(b)
Number of more girls than boys
= 7 u - 5 u
= 2 u
= 2 x 6
= 12
(c)
Number of more stickers given to the boys than girls
= 15 u - 14 u
= 1 u
= 1 x 6
= 6
Answer(s): (a) 72; (b) 12; (c) 6