The ratio of George's money to Oliver's money is 3 : 7. If Oliver has $91, how much must he give to George so both will have the equal amount of money?
| |
George |
Oliver |
Total |
| Before |
3 u |
7 u |
10 u |
| Change |
+ 2 u |
- 2 u |
|
| After |
5 u |
5 u |
10 u |
Comparing George and
Oliver in the end |
1 |
1 |
|
Amount that Oliver has at first = 7 u
7 u = 91
1 u = 91 ÷ 7 = 13
Total amount that Oliver and George have
= 3 u + 7 u
= 10 u
Amount that each of them will have in the end
= 10 u ÷ 2
= 5 u
Amount that Oliver must give to George
= 5 u - 3 u
= 2 u
= 2 x 13
= $26
Answer(s): $26
