The number of $5, $50 and $100 notes in a piggy bank is in the ratio of 4 : 5 : 9. The notes are worth $9360 altogether. Find the total number of $5 and $50 notes.
| |
$5 |
$50 |
$100 |
Total |
| Number |
4 u |
5 u |
9 u |
|
| Value |
$5 |
$50 |
$100 |
|
| Total value |
20 u |
250 u |
900 u |
$9360 |
Total value of $5, $50 and $100 notes
= 20 u + 250 u + 900 u
= 1170 u
1170 u = 9360
1 u = 9360 ÷ 1170 = 8
Number of $5 and $50 notes
= 4 u + 5 u
= 9 u
= 9 x 8
= 72
Answer(s): 72
