The number of $10, $50 and $100 notes in a piggy bank is in the ratio of 2 : 3 : 8. The notes are worth $10670 altogether. Find the total number of $10 and $50 notes.
| |
$10 |
$50 |
$100 |
Total |
| Number |
2 u |
3 u |
8 u |
|
| Value |
$10 |
$50 |
$100 |
|
| Total value |
20 u |
150 u |
800 u |
$10670 |
Total value of $10, $50 and $100 notes
= 20 u + 150 u + 800 u
= 970 u
970 u = 10670
1 u = 10670 ÷ 970 = 11
Number of $10 and $50 notes
= 2 u + 3 u
= 5 u
= 5 x 11
= 55
Answer(s): 55
