In a box of notes, the number of $2, $5 and $100 are in ratio of 5 : 8 : 7.
35 of the $2-notes is taken out and another 11 $5-notes are added. The remaining notes are worth $7495. Find the difference between the value of $100-notes and $2-notes in the end.
| |
$2 |
$5 |
$100 |
| Before |
5 u |
8 u |
7 u |
| Change |
- 3 u |
+ 11 |
|
| After |
2 u |
8 u + 11 |
7 u |
| |
$2 |
$5 |
$100 |
Total |
| Number |
2 u |
8 u + 11 |
7 u |
|
| Value |
2 |
5 |
100 |
|
| Total value |
4 u |
40 u + 55 |
700 u |
7495 |
Total value of the notes
= 4 u + 40 u + 55 + 700 u
= 744 u + 55
744 u + 55 = 7495
744 u = 7495 - 55
744 u = 7440
1 u = 7440 ÷ 744 = 10
Difference between the value of $100-notes and $2-notes in the end
= 700 u - 4 u
= 696 u
= 696 x 10
= $6960
Answer(s): $6960
