In a bag of notes, the number of $2, $20 and $50 are in ratio of 5 : 1 : 8.
25 of the $2-notes and 5 $20-notes are taken out. The remaining notes are worth $752. Find the difference between the value of $50-notes and $2-notes in the end.
|
$2 |
$20 |
$50 |
Before |
5 u |
1 u |
8 u |
Change |
- 2 u |
- 5 |
|
After |
3 u |
1 u - 5 |
8 u |
|
$2 |
$20 |
$50 |
Total |
Number |
3 u |
1 u - 5 |
8 u |
|
Value |
2 |
20 |
50 |
|
Total value |
6 u |
20 u - 100 |
400 u |
752 |
Total value of the notes
= 6 u + 20 u - 100 + 400 u
= 426 u - 100
426 u - 100 = 752
426 u = 752 + 100
426 u = 852
1 u = 852 ÷ 426 = 2
Difference between the value of $50-notes and $2-notes in the end
= 400 u - 6 u
= 394 u
= 394 x 2
= $788
Answer(s): $788