The ratio of Ken's money to David's money is 3 : 11. If David has $22, how much must he give to Ken so both will have the equal amount of money?
| |
Ken |
David |
Total |
| Before |
3 u |
11 u |
14 u |
| Change |
+ 4 u |
- 4 u |
|
| After |
7 u |
7 u |
14 u |
Comparing Ken and
David in the end |
1 |
1 |
|
Amount that David has at first = 11 u
11 u = 22
1 u = 22 ÷ 11 = 2
Total amount that David and Ken have
= 3 u + 11 u
= 14 u
Amount that each of them will have in the end
= 14 u ÷ 2
= 7 u
Amount that David must give to Ken
= 7 u - 3 u
= 4 u
= 4 x 2
= $8
Answer(s): $8
