Four boys, Rael, Riordan, Mark and Oliver saved some money. Riordan's savings was
25 of the total savings of Rael, Mark and Oliver. Rael's savings was 30% of the total savings. Mark's savings was
25 of the total savings of Riordan and Oliver. If Riordan's savings was $740, how much less was Mark's savings than the total of the other three boys?
| Riordan |
Oliver |
Mark |
Rael |
Total |
| 2x10 |
5x10 |
7x10 |
| 7x7 |
3x7 |
10x7 |
| 5x7 |
2x7 |
|
|
| 20 u |
15 u |
14 u |
21 u |
70 u |
30% →
30100=
310 Rael's savings : Total savings = 3 : 10
Riordan's savings = 20 u
20 u = 740
1 u = 740 ÷ 20 = 37
Mark's savings = 14 u
Savings of the other three boys
= 20 u + 15 u + 21 u
= 56 u
Savings that Mark had less than the total of the three other boys
= 56 u - 14 u
= 42 u
= 42 x 37
= $1554
Answer(s): $1554
