The ratio of the number of boys to the number of girls is 5 : 7.
Each boy is given 10 stickers.
Each girl is given 3 stickers.
The total number of stickers is 426.
- 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 |
10 |
3 |
Total stickers |
50 u |
21 u |
(a)
Total number of stickers
= 50 u + 21 u
= 71 u
71 u = 426
1 u = 426 ÷ 71 = 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
= 50 u - 21 u
= 29 u
= 29 x 6
= 174
Answer(s): (a) 72; (b) 12; (c) 174