The ratio of the number of boys to the number of girls is 5 : 7.
Each boy is given 5 stickers.
Each girl is given 3 stickers.
The total number of stickers is 322.
- 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 |
5 |
3 |
Total stickers |
25 u |
21 u |
(a)
Total number of stickers
= 25 u + 21 u
= 46 u
46 u = 322
1 u = 322 ÷ 46 = 7
Number of children
= 5 u + 7 u
= 12 u
= 12 x 7
= 84
(b)
Number of more girls than boys
= 7 u - 5 u
= 2 u
= 2 x 7
= 14
(c)
Number of more stickers given to the boys than girls
= 25 u - 21 u
= 4 u
= 4 x 7
= 28
Answer(s): (a) 84; (b) 14; (c) 28