The ratio of the number of boys to the number of girls is 3 : 5.
Each boy is given 7 stickers.
Each girl is given 3 stickers.
The total number of stickers is 216.
- 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 |
3 u |
5 u |
Stickers for each person |
7 |
3 |
Total stickers |
21 u |
15 u |
(a)
Total number of stickers
= 21 u + 15 u
= 36 u
36 u = 216
1 u = 216 ÷ 36 = 6
Number of children
= 3 u + 5 u
= 8 u
= 8 x 6
= 48
(b)
Number of more girls than boys
= 5 u - 3 u
= 2 u
= 2 x 6
= 12
(c)
Number of more stickers given to the boys than girls
= 21 u - 15 u
= 6 u
= 6 x 6
= 36
Answer(s): (a) 48; (b) 12; (c) 36