The number of $5, $20 and $100 notes in a piggy bank is in the ratio of 1 : 7 : 6. The notes are worth $5215 altogether. Find the total number of $5 and $20 notes.
| |
$5 |
$20 |
$100 |
Total |
| Number |
1 u |
7 u |
6 u |
|
| Value |
$5 |
$20 |
$100 |
|
| Total value |
5 u |
140 u |
600 u |
$5215 |
Total value of $5, $20 and $100 notes
= 5 u + 140 u + 600 u
= 745 u
745 u = 5215
1 u = 5215 ÷ 745 = 7
Number of $5 and $20 notes
= 1 u + 7 u
= 8 u
= 8 x 7
= 56
Answer(s): 56
