The number of $10, $20 and $100 notes in a piggy bank is in the ratio of 6 : 5 : 1. The notes are worth $2340 altogether. Find the total number of $20 and $100 notes.
| |
$10 |
$20 |
$100 |
Total |
| Number |
6 u |
5 u |
1 u |
|
| Value |
$10 |
$20 |
$100 |
|
| Total value |
60 u |
100 u |
100 u |
$2340 |
Total value of $10, $20 and $100 notes
= 60 u + 100 u + 100 u
= 260 u
260 u = 2340
1 u = 2340 ÷ 260 = 9
Number of $20 and $100 notes
= 5 u + 1 u
= 6 u
= 6 x 9
= 54
Answer(s): 54
