The ratio of Bobby's money to Riordan's money is 5 : 11. If Riordan has $440, how much must he give to Bobby so both will have the equal amount of money?
| |
Bobby |
Riordan |
Total |
| Before |
5 u |
11 u |
16 u |
| Change |
+ 3 u |
- 3 u |
|
| After |
8 u |
8 u |
16 u |
Comparing Bobby and
Riordan in the end |
1 |
1 |
|
Amount that Riordan has at first = 11 u
11 u = 440
1 u = 440 ÷ 11 = 40
Total amount that Riordan and Bobby have
= 5 u + 11 u
= 16 u
Amount that each of them will have in the end
= 16 u ÷ 2
= 8 u
Amount that Riordan must give to Bobby
= 8 u - 5 u
= 3 u
= 3 x 40
= $120
Answer(s): $120
