Bryan, Charlie and Adam have some stickers in the ratio of 14 : 5 : 2.
Bryan gives Charlie and Adam a total of 70 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 |
14 u |
5 u |
2 u |
Change |
- 7 u |
+ 2 u |
+ 5 u |
After |
7 u |
7 u |
7 u |
(a)
Total number of stickers
= 14 u + 5 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 Bryan gives away
= 14 u - 7 u
= 7 u
7 u = 70
1 u = 70 ÷ 7 = 10
Total number of stickers
= 21 u
= 21 x 10
= 210
(b)
Number of stickers that Bryan gives to Charlie
= 7 u - 5 u
= 2 u
= 2 x 10
= 20
(c)
Number of stickers that Bryan gives to Adam
= 7 u - 2 u
= 5 u
= 5 x 10
= 50
Answer(s): (a) 210; (b) 20; (c) 50