The number of $5, $10 and $50 notes in a piggy bank is in the ratio of 3 : 2 : 5. The notes are worth $3135 altogether. Find the total number of $10 and $50 notes.
| |
$5 |
$10 |
$50 |
Total |
| Number |
3 u |
2 u |
5 u |
|
| Value |
$5 |
$10 |
$50 |
|
| Total value |
15 u |
20 u |
250 u |
$3135 |
Total value of $5, $10 and $50 notes
= 15 u + 20 u + 250 u
= 285 u
285 u = 3135
1 u = 3135 ÷ 285 = 11
Number of $10 and $50 notes
= 2 u + 5 u
= 7 u
= 7 x 11
= 77
Answer(s): 77
