In a bag of notes, the number of $5, $10 and $50 are in ratio of 6 : 6 : 7.
16 of the $5-notes and 4 $10-notes are taken out. The remaining notes are worth $3440. Find the difference between the value of $50-notes and $5-notes in the end.
| |
$5 |
$10 |
$50 |
| Before |
6 u |
6 u |
7 u |
| Change |
- 1 u |
- 4 |
|
| After |
5 u |
6 u - 4 |
7 u |
| |
$5 |
$10 |
$50 |
Total |
| Number |
5 u |
6 u - 4 |
7 u |
|
| Value |
5 |
10 |
50 |
|
| Total value |
25 u |
60 u - 40 |
350 u |
3440 |
Total value of the notes
= 25 u + 60 u - 40 + 350 u
= 435 u - 40
435 u - 40 = 3440
435 u = 3440 + 40
435 u = 3480
1 u = 3480 ÷ 435 = 8
Difference between the value of $50-notes and $5-notes in the end
= 350 u - 25 u
= 325 u
= 325 x 8
= $2600
Answer(s): $2600
