The ratio of the number of boys to the number of girls is 4 : 7.
Each boy is given 9 stickers.
Each girl is given 5 stickers.
The total number of stickers is 710.
- 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 |
4 u |
7 u |
Stickers for each person |
9 |
5 |
Total stickers |
36 u |
35 u |
(a)
Total number of stickers
= 36 u + 35 u
= 71 u
71 u = 710
1 u = 710 ÷ 71 = 10
Number of children
= 4 u + 7 u
= 11 u
= 11 x 10
= 110
(b)
Number of more girls than boys
= 7 u - 4 u
= 3 u
= 3 x 10
= 30
(c)
Number of more stickers given to the boys than girls
= 36 u - 35 u
= 1 u
= 1 x 10
= 10
Answer(s): (a) 110; (b) 30; (c) 10