Bryan, Charlie and Adam have some stickers in the ratio of 10 : 3 : 2.
Bryan gives Charlie and Adam a total of 40 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 Bryan gives to Charlie?
- What is the number of stickers that Bryan gives to Adam?
|
Bryan |
Charlie |
Adam |
Before |
10 u |
3 u |
2 u |
Change |
- 5 u |
+ 2 u |
+ 3 u |
After |
5 u |
5 u |
5 u |
(a)
Total number of stickers
= 10 u + 3 u + 2 u
= 15 u
Number of stickers that each must have to be the same number
= 15 u ÷ 3
= 5 u
Number of stickers that Bryan gives away
= 10 u - 5 u
= 5 u
5 u = 40
1 u = 40 ÷ 5 = 8
Total number of stickers
= 15 u
= 15 x 8
= 120
(b)
Number of stickers that Bryan gives to Charlie
= 5 u - 3 u
= 2 u
= 2 x 8
= 16
(c)
Number of stickers that Bryan gives to Adam
= 5 u - 2 u
= 3 u
= 3 x 8
= 24
Answer(s): (a) 120; (b) 16; (c) 24