The ratio of Mark's money to Ethan's money is 11 : 15. If Ethan has $195, how much must he give to Mark so both will have the equal amount of money?
| |
Mark |
Ethan |
Total |
| Before |
11 u |
15 u |
26 u |
| Change |
+ 2 u |
- 2 u |
|
| After |
13 u |
13 u |
26 u |
Comparing Mark and
Ethan in the end |
1 |
1 |
|
Amount that Ethan has at first = 15 u
15 u = 195
1 u = 195 ÷ 15 = 13
Total amount that Ethan and Mark have
= 11 u + 15 u
= 26 u
Amount that each of them will have in the end
= 26 u ÷ 2
= 13 u
Amount that Ethan must give to Mark
= 13 u - 11 u
= 2 u
= 2 x 13
= $26
Answer(s): $26
