The number of $10, $50 and $100 notes in a piggy bank is in the ratio of 5 : 9 : 2. The notes are worth $5600 altogether. Find the total number of $10 and $50 notes.
| |
$10 |
$50 |
$100 |
Total |
| Number |
5 u |
9 u |
2 u |
|
| Value |
$10 |
$50 |
$100 |
|
| Total value |
50 u |
450 u |
200 u |
$5600 |
Total value of $10, $50 and $100 notes
= 50 u + 450 u + 200 u
= 700 u
700 u = 5600
1 u = 5600 ÷ 700 = 8
Number of $10 and $50 notes
= 5 u + 9 u
= 14 u
= 14 x 8
= 112
Answer(s): 112
