Bryan, Adam and Charlie have some stickers in the ratio of 10 : 3 : 2.
Bryan gives Adam and Charlie 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 Bryan gives to Adam?
- What is the number of stickers that Bryan gives to Charlie?
|
Bryan |
Adam |
Charlie |
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 = 30
1 u = 30 ÷ 5 = 6
Total number of stickers
= 15 u
= 15 x 6
= 90
(b)
Number of stickers that Bryan gives to Adam
= 5 u - 3 u
= 2 u
= 2 x 6
= 12
(c)
Number of stickers that Bryan gives to Charlie
= 5 u - 2 u
= 3 u
= 3 x 6
= 18
Answer(s): (a) 90; (b) 12; (c) 18