The number of $2, $10 and $100 notes in a piggy bank is in the ratio of 4 : 1 : 5. The notes are worth $6216 altogether. Find the total number of $10 and $100 notes.
| |
$2 |
$10 |
$100 |
Total |
| Number |
4 u |
1 u |
5 u |
|
| Value |
$2 |
$10 |
$100 |
|
| Total value |
8 u |
10 u |
500 u |
$6216 |
Total value of $2, $10 and $100 notes
= 8 u + 10 u + 500 u
= 518 u
518 u = 6216
1 u = 6216 ÷ 518 = 12
Number of $10 and $100 notes
= 1 u + 5 u
= 6 u
= 6 x 12
= 72
Answer(s): 72
