In a pouch of notes, the number of $2, $5 and $50 are in ratio of 6 : 8 : 1.
16 of the $2-notes and 15 $5-notes are taken out. The remaining notes are worth $1125. Find the difference between the value of $50-notes and $2-notes in the end.
| |
$2 |
$5 |
$50 |
| Before |
6 u |
8 u |
1 u |
| Change |
- 1 u |
- 15 |
|
| After |
5 u |
8 u - 15 |
1 u |
| |
$2 |
$5 |
$50 |
Total |
| Number |
5 u |
8 u - 15 |
1 u |
|
| Value |
2 |
5 |
50 |
|
| Total value |
10 u |
40 u - 75 |
50 u |
1125 |
Total value of the notes
= 10 u + 40 u - 75 + 50 u
= 100 u - 75
100 u - 75 = 1125
100 u = 1125 + 75
100 u = 1200
1 u = 1200 ÷ 100 = 12
Difference between the value of $50-notes and $2-notes in the end
= 50 u - 10 u
= 40 u
= 40 x 12
= $480
Answer(s): $480
