The number of $2, $20 and $100 notes in a piggy bank is in the ratio of 2 : 2 : 3. The notes are worth $2064 altogether. Find the total number of $20 and $100 notes.
| |
$2 |
$20 |
$100 |
Total |
| Number |
2 u |
2 u |
3 u |
|
| Value |
$2 |
$20 |
$100 |
|
| Total value |
4 u |
40 u |
300 u |
$2064 |
Total value of $2, $20 and $100 notes
= 4 u + 40 u + 300 u
= 344 u
344 u = 2064
1 u = 2064 ÷ 344 = 6
Number of $20 and $100 notes
= 2 u + 3 u
= 5 u
= 5 x 6
= 30
Answer(s): 30
