The number of $10, $50 and $100 notes in a piggy bank is in the ratio of 6 : 2 : 9. The notes are worth $9540 altogether. Find the total number of $10 and $50 notes.
|
$10 |
$50 |
$100 |
Total |
Number |
6 u |
2 u |
9 u |
|
Value |
$10 |
$50 |
$100 |
|
Total value |
60 u |
100 u |
900 u |
$9540 |
Total value of $10, $50 and $100 notes
= 60 u + 100 u + 900 u
= 1060 u
1060 u = 9540
1 u = 9540 ÷ 1060 = 9
Number of $10 and $50 notes
= 6 u + 2 u
= 8 u
= 8 x 9
= 72
Answer(s): 72