Charlie, Adam and Bryan have some stickers in the ratio of 15 : 5 : 4.
Charlie gives Adam and Bryan a total of 105 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 |
5 u |
4 u |
Change |
- 7 u |
+ 3 u |
+ 4 u |
After |
8 u |
8 u |
8 u |
(a)
Total number of stickers
= 15 u + 5 u + 4 u
= 24 u
Number of stickers that each must have to be the same number
= 24 u ÷ 3
= 8 u
Number of stickers that Charlie gives away
= 15 u - 8 u
= 7 u
7 u = 105
1 u = 105 ÷ 7 = 15
Total number of stickers
= 24 u
= 24 x 15
= 360
(b)
Number of stickers that Charlie gives to Adam
= 8 u - 5 u
= 3 u
= 3 x 15
= 45
(c)
Number of stickers that Charlie gives to Bryan
= 8 u - 4 u
= 4 u
= 4 x 15
= 60
Answer(s): (a) 360; (b) 45; (c) 60