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 2 stickers.
The total number of stickers is 236.
- 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 |
2 |
Total stickers |
45 u |
14 u |
(a)
Total number of stickers
= 45 u + 14 u
= 59 u
59 u = 236
1 u = 236 ÷ 59 = 4
Number of children
= 5 u + 7 u
= 12 u
= 12 x 4
= 48
(b)
Number of more girls than boys
= 7 u - 5 u
= 2 u
= 2 x 4
= 8
(c)
Number of more stickers given to the boys than girls
= 45 u - 14 u
= 31 u
= 31 x 4
= 124
Answer(s): (a) 48; (b) 8; (c) 124