Charlie, Adam and Bryan have some stickers in the ratio of 15 : 4 : 2.
Charlie gives Adam and Bryan a total of 48 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 Adam?
- What is the number of stickers that Charlie gives to Bryan?
|
Charlie |
Adam |
Bryan |
Before |
15 u |
4 u |
2 u |
Change |
- 8 u |
+ 3 u |
+ 5 u |
After |
7 u |
7 u |
7 u |
(a)
Total number of stickers
= 15 u + 4 u + 2 u
= 21 u
Number of stickers that each must have to be the same number
= 21 u ÷ 3
= 7 u
Number of stickers that Charlie gives away
= 15 u - 7 u
= 8 u
8 u = 48
1 u = 48 ÷ 8 = 6
Total number of stickers
= 21 u
= 21 x 6
= 126
(b)
Number of stickers that Charlie gives to Adam
= 7 u - 4 u
= 3 u
= 3 x 6
= 18
(c)
Number of stickers that Charlie gives to Bryan
= 7 u - 2 u
= 5 u
= 5 x 6
= 30
Answer(s): (a) 126; (b) 18; (c) 30