The number of $2, $20 and $100 notes in a piggy bank is in the ratio of 8 : 1 : 8. The notes are worth $7524 altogether. Find the total number of $2 and $20 notes.
| |
$2 |
$20 |
$100 |
Total |
| Number |
8 u |
1 u |
8 u |
|
| Value |
$2 |
$20 |
$100 |
|
| Total value |
16 u |
20 u |
800 u |
$7524 |
Total value of $2, $20 and $100 notes
= 16 u + 20 u + 800 u
= 836 u
836 u = 7524
1 u = 7524 ÷ 836 = 9
Number of $2 and $20 notes
= 8 u + 1 u
= 9 u
= 9 x 9
= 81
Answer(s): 81
