In a pouch of notes, the number of $2, $20 and $50 are in ratio of 4 : 6 : 5.
14 of the $2-notes and 4 $20-notes are taken out. The remaining notes are worth $1800. Find the difference between the value of $50-notes and $2-notes in the end.
| |
$2 |
$20 |
$50 |
| Before |
4 u |
6 u |
5 u |
| Change |
- 1 u |
- 4 |
|
| After |
3 u |
6 u - 4 |
5 u |
| |
$2 |
$20 |
$50 |
Total |
| Number |
3 u |
6 u - 4 |
5 u |
|
| Value |
2 |
20 |
50 |
|
| Total value |
6 u |
120 u - 80 |
250 u |
1800 |
Total value of the notes
= 6 u + 120 u - 80 + 250 u
= 376 u - 80
376 u - 80 = 1800
376 u = 1800 + 80
376 u = 1880
1 u = 1880 ÷ 376 = 5
Difference between the value of $50-notes and $2-notes in the end
= 250 u - 6 u
= 244 u
= 244 x 5
= $1220
Answer(s): $1220
