In a bag of notes, the number of $2, $10 and $50 are in ratio of 5 : 7 : 6.
35 of the $2-notes and 5 $10-notes are taken out. The remaining notes are worth $1072. Find the difference between the value of $50-notes and $2-notes in the end.
| |
$2 |
$10 |
$50 |
| Before |
5 u |
7 u |
6 u |
| Change |
- 3 u |
- 5 |
|
| After |
2 u |
7 u - 5 |
6 u |
| |
$2 |
$10 |
$50 |
Total |
| Number |
2 u |
7 u - 5 |
6 u |
|
| Value |
2 |
10 |
50 |
|
| Total value |
4 u |
70 u - 50 |
300 u |
1072 |
Total value of the notes
= 4 u + 70 u - 50 + 300 u
= 374 u - 50
374 u - 50 = 1072
374 u = 1072 + 50
374 u = 1122
1 u = 1122 ÷ 374 = 3
Difference between the value of $50-notes and $2-notes in the end
= 300 u - 4 u
= 296 u
= 296 x 3
= $888
Answer(s): $888
