The ratio of the number of boys to the number of girls is 5 : 7.
Each boy is given 9 stickers.
Each girl is given 4 stickers.
The total number of stickers is 219.
- 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 |
9 |
4 |
Total stickers |
45 u |
28 u |
(a)
Total number of stickers
= 45 u + 28 u
= 73 u
73 u = 219
1 u = 219 ÷ 73 = 3
Number of children
= 5 u + 7 u
= 12 u
= 12 x 3
= 36
(b)
Number of more girls than boys
= 7 u - 5 u
= 2 u
= 2 x 3
= 6
(c)
Number of more stickers given to the boys than girls
= 45 u - 28 u
= 17 u
= 17 x 3
= 51
Answer(s): (a) 36; (b) 6; (c) 51