The ratio of the number of girls to the number of boys is 1 : 3.
Each girl is given 10 stickers.
Each boy is given 3 stickers.
The total number of stickers is 133.
- How many children are there?
- How many more boys than girls are there?
- How many more stickers are given to the girls than the boys?
|
Girls |
Boys |
Number |
1 u |
3 u |
Stickers for each person |
10 |
3 |
Total stickers |
10 u |
9 u |
(a)
Total number of stickers
= 10 u + 9 u
= 19 u
19 u = 133
1 u = 133 ÷ 19 = 7
Number of children
= 1 u + 3 u
= 4 u
= 4 x 7
= 28
(b)
Number of more boys than girls
= 3 u - 1 u
= 2 u
= 2 x 7
= 14
(c)
Number of more stickers given to the girls than boys
= 10 u - 9 u
= 1 u
= 1 x 7
= 7
Answer(s): (a) 28; (b) 14; (c) 7