Four boys, Ivan, Cole, Jeremy and Mark saved some money. Cole's savings was
78 of the total savings of Ivan, Jeremy and Mark. Ivan's savings was 10% of the total savings. Jeremy's savings was
18 of the total savings of Cole and Mark. If Cole's savings was $280, how much less was Jeremy's savings than the total of the other three boys?
Cole |
Mark |
Jeremy |
Ivan |
Total |
7x2 |
8x2 |
15x2 |
9x3 |
1x3 |
10x3 |
8x3 |
1x3 |
|
|
14 u |
10 u |
3 u |
3 u |
30 u |
10% →
10100=
110 Ivan's savings : Total savings = 1 : 10
Cole's savings = 14 u
14 u = 280
1 u = 280 ÷ 14 = 20
Jeremy's savings = 3 u
Savings of the other three boys
= 14 u + 10 u + 3 u
= 27 u
Savings that Jeremy had less than the total of the three other boys
= 27 u - 3 u
= 24 u
= 24 x 20
= $480
Answer(s): $480