Charlie, Bryan and Adam have some stickers in the ratio of 11 : 5 : 2.
Charlie gives Bryan and Adam a total of 30 stickers.
Now they have same number of stickers.
- What is the total number of stickers that they have?
- What is the number of stickers that Charlie gives to Bryan?
- What is the number of stickers that Charlie gives to Adam?
|
Charlie |
Bryan |
Adam |
Before |
11 u |
5 u |
2 u |
Change |
- 5 u |
+ 1 u |
+ 4 u |
After |
6 u |
6 u |
6 u |
(a)
Total number of stickers
= 11 u + 5 u + 2 u
= 18 u
Number of stickers that each must have to be the same number
= 18 u ÷ 3
= 6 u
Number of stickers that Charlie gives away
= 11 u - 6 u
= 5 u
5 u = 30
1 u = 30 ÷ 5 = 6
Total number of stickers
= 18 u
= 18 x 6
= 108
(b)
Number of stickers that Charlie gives to Bryan
= 6 u - 5 u
= 1 u
= 1 x 6
= 6
(c)
Number of stickers that Charlie gives to Adam
= 6 u - 2 u
= 4 u
= 4 x 6
= 24
Answer(s): (a) 108; (b) 6; (c) 24