The ratio of Sean's money to Tom's money is 11 : 15. If Tom has $135, how much must he give to Sean so both will have the equal amount of money?
| |
Sean |
Tom |
Total |
| Before |
11 u |
15 u |
26 u |
| Change |
+ 2 u |
- 2 u |
|
| After |
13 u |
13 u |
26 u |
Comparing Sean and
Tom in the end |
1 |
1 |
|
Amount that Tom has at first = 15 u
15 u = 135
1 u = 135 ÷ 15 = 9
Total amount that Tom and Sean have
= 11 u + 15 u
= 26 u
Amount that each of them will have in the end
= 26 u ÷ 2
= 13 u
Amount that Tom must give to Sean
= 13 u - 11 u
= 2 u
= 2 x 9
= $18
Answer(s): $18
