The number of $2, $5 and $100 notes in a piggy bank is in the ratio of 7 : 3 : 9. The notes are worth $9290 altogether. Find the total number of $5 and $100 notes.
| |
$2 |
$5 |
$100 |
Total |
| Number |
7 u |
3 u |
9 u |
|
| Value |
$2 |
$5 |
$100 |
|
| Total value |
14 u |
15 u |
900 u |
$9290 |
Total value of $2, $5 and $100 notes
= 14 u + 15 u + 900 u
= 929 u
929 u = 9290
1 u = 9290 ÷ 929 = 10
Number of $5 and $100 notes
= 3 u + 9 u
= 12 u
= 12 x 10
= 120
Answer(s): 120
