The number of $5, $20 and $100 notes in a piggy bank is in the ratio of 5 : 8 : 8. The notes are worth $11820 altogether. Find the total number of $5 and $20 notes.
| |
$5 |
$20 |
$100 |
Total |
| Number |
5 u |
8 u |
8 u |
|
| Value |
$5 |
$20 |
$100 |
|
| Total value |
25 u |
160 u |
800 u |
$11820 |
Total value of $5, $20 and $100 notes
= 25 u + 160 u + 800 u
= 985 u
985 u = 11820
1 u = 11820 ÷ 985 = 12
Number of $5 and $20 notes
= 5 u + 8 u
= 13 u
= 13 x 12
= 156
Answer(s): 156
