The number of $10, $50 and $100 notes in a piggy bank is in the ratio of 6 : 1 : 3. The notes are worth $4100 altogether. Find the total number of $10 and $50 notes.
| |
$10 |
$50 |
$100 |
Total |
| Number |
6 u |
1 u |
3 u |
|
| Value |
$10 |
$50 |
$100 |
|
| Total value |
60 u |
50 u |
300 u |
$4100 |
Total value of $10, $50 and $100 notes
= 60 u + 50 u + 300 u
= 410 u
410 u = 4100
1 u = 4100 ÷ 410 = 10
Number of $10 and $50 notes
= 6 u + 1 u
= 7 u
= 7 x 10
= 70
Answer(s): 70
