In a bag of notes, the number of $5, $10 and $50 are in ratio of 2 : 8 : 5.
12 of the $5-notes and 3 $10-notes are taken out. The remaining notes are worth $2985. Find the difference between the value of $50-notes and $5-notes in the end.
| |
$5 |
$10 |
$50 |
| Before |
2 u |
8 u |
5 u |
| Change |
- 1 u |
- 3 |
|
| After |
1 u |
8 u - 3 |
5 u |
| |
$5 |
$10 |
$50 |
Total |
| Number |
1 u |
8 u - 3 |
5 u |
|
| Value |
5 |
10 |
50 |
|
| Total value |
5 u |
80 u - 30 |
250 u |
2985 |
Total value of the notes
= 5 u + 80 u - 30 + 250 u
= 335 u - 30
335 u - 30 = 2985
335 u = 2985 + 30
335 u = 3015
1 u = 3015 ÷ 335 = 9
Difference between the value of $50-notes and $5-notes in the end
= 250 u - 5 u
= 245 u
= 245 x 9
= $2205
Answer(s): $2205
