The ratio of the number of boys to the number of girls is 5 : 8.
Each boy is given 9 stickers.
Each girl is given 5 stickers.
The total number of stickers is 340.
- 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 |
8 u |
Stickers for each person |
9 |
5 |
Total stickers |
45 u |
40 u |
(a)
Total number of stickers
= 45 u + 40 u
= 85 u
85 u = 340
1 u = 340 ÷ 85 = 4
Number of children
= 5 u + 8 u
= 13 u
= 13 x 4
= 52
(b)
Number of more girls than boys
= 8 u - 5 u
= 3 u
= 3 x 4
= 12
(c)
Number of more stickers given to the boys than girls
= 45 u - 40 u
= 5 u
= 5 x 4
= 20
Answer(s): (a) 52; (b) 12; (c) 20