Four boys, Harry, Fred, Bobby and Sam saved some money. Fred's savings was
19 of the total savings of Harry, Bobby and Sam. Harry's savings was 20% of the total savings. Bobby's savings was
13 of the total savings of Fred and Sam. If Fred's savings was $12, how much less was Bobby's savings than the total of the other three boys?
Fred |
Sam |
Bobby |
Harry |
Total |
1x1 |
9x1 |
10x1 |
4x2 |
1x2 |
5x2 |
3x2 |
1x2 |
|
|
1 u |
5 u |
2 u |
2 u |
10 u |
20% →
20100=
15 Harry's savings : Total savings = 1 : 5
Fred's savings = 1 u
1 u = 12
1 u = 12 ÷ 1 = 12
Bobby's savings = 2 u
Savings of the other three boys
= 1 u + 5 u + 2 u
= 8 u
Savings that Bobby had less than the total of the three other boys
= 8 u - 2 u
= 6 u
= 6 x 12
= $72
Answer(s): $72