The ratio of Sam's money to Vaidev's money is 1 : 7. If Vaidev has $147, how much must he give to Sam so both will have the equal amount of money?
| |
Sam |
Vaidev |
Total |
| Before |
1 u |
7 u |
8 u |
| Change |
+ 3 u |
- 3 u |
|
| After |
4 u |
4 u |
8 u |
Comparing Sam and
Vaidev in the end |
1 |
1 |
|
Amount that Vaidev has at first = 7 u
7 u = 147
1 u = 147 ÷ 7 = 21
Total amount that Vaidev and Sam have
= 1 u + 7 u
= 8 u
Amount that each of them will have in the end
= 8 u ÷ 2
= 4 u
Amount that Vaidev must give to Sam
= 4 u - 1 u
= 3 u
= 3 x 21
= $63
Answer(s): $63
