The ratio of the number of girls to the number of boys is 4 : 7.
Each girl is given 10 stickers.
Each boy is given 4 stickers.
The total number of stickers is 816.
- 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 |
4 u |
7 u |
Stickers for each person |
10 |
4 |
Total stickers |
40 u |
28 u |
(a)
Total number of stickers
= 40 u + 28 u
= 68 u
68 u = 816
1 u = 816 ÷ 68 = 12
Number of children
= 4 u + 7 u
= 11 u
= 11 x 12
= 132
(b)
Number of more boys than girls
= 7 u - 4 u
= 3 u
= 3 x 12
= 36
(c)
Number of more stickers given to the girls than boys
= 40 u - 28 u
= 12 u
= 12 x 12
= 144
Answer(s): (a) 132; (b) 36; (c) 144