The ratio of the number of girls to the number of boys is 5 : 7.
Each girl is given 7 stickers.
Each boy is given 4 stickers.
The total number of children is 72.
- How many stickers are given to the children?
- How many less girls than boys are there?
- How many less stickers are given to the boys than the girls?
|
Girls |
Boys |
Number |
5 u |
7 u |
Stickers for each person |
7 |
4 |
Total stickers |
35 u |
28 u |
(a)
Number of children
= 5 u + 7 u
= 12 u
12 u = 72
1 u = 72 ÷ 12 = 6
Total number of stickers
= 35 u + 28 u
= 63 u
= 63 x 6
= 378
(b)
Number of less girls than boys
= 7 u - 5 u
= 2 u
= 2 x 6
= 12
(c)
Number of less stickers are given to the boys than the girls
= 35 u - 28 u
= 7 u
= 7 x 6
= 42
Answer(s): (a) 378; (b) 12; (c) 42