The ratio of the number of boys to the number of girls is 2 : 5.
Each boy is given 9 stickers.
Each girl is given 2 stickers.
The total number of stickers is 140.
- 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 |
2 u |
5 u |
Stickers for each person |
9 |
2 |
Total stickers |
18 u |
10 u |
(a)
Total number of stickers
= 18 u + 10 u
= 28 u
28 u = 140
1 u = 140 ÷ 28 = 5
Number of children
= 2 u + 5 u
= 7 u
= 7 x 5
= 35
(b)
Number of more girls than boys
= 5 u - 2 u
= 3 u
= 3 x 5
= 15
(c)
Number of more stickers given to the boys than girls
= 18 u - 10 u
= 8 u
= 8 x 5
= 40
Answer(s): (a) 35; (b) 15; (c) 40