Four boys, Ivan, Ian, Ethan and Justin saved some money. Ian's savings was
12 of the total savings of Ivan, Ethan and Justin. Ivan's savings was 10% of the total savings. Ethan's savings was
45 of the total savings of Ian and Justin. If Ian's savings was $250, how much less was Ethan's savings than the total of the other three boys?
| Ian |
Justin |
Ethan |
Ivan |
Total |
| 1x10 |
2x10 |
3x10 |
| 9x3 |
1x3 |
10x3 |
| 5x3 |
4x3 |
|
|
| 10 u |
5 u |
12 u |
3 u |
30 u |
10% →
10100=
110 Ivan's savings : Total savings = 1 : 10
Ian's savings = 10 u
10 u = 250
1 u = 250 ÷ 10 = 25
Ethan's savings = 12 u
Savings of the other three boys
= 10 u + 5 u + 3 u
= 18 u
Savings that Ethan had less than the total of the three other boys
= 18 u - 12 u
= 6 u
= 6 x 25
= $150
Answer(s): $150
