The number of $2, $5 and $20 notes in a piggy bank is in the ratio of 9 : 3 : 8. The notes are worth $2123 altogether. Find the total number of $5 and $20 notes.
|
$2 |
$5 |
$20 |
Total |
Number |
9 u |
3 u |
8 u |
|
Value |
$2 |
$5 |
$20 |
|
Total value |
18 u |
15 u |
160 u |
$2123 |
Total value of $2, $5 and $20 notes
= 18 u + 15 u + 160 u
= 193 u
193 u = 2123
1 u = 2123 ÷ 193 = 11
Number of $5 and $20 notes
= 3 u + 8 u
= 11 u
= 11 x 11
= 121
Answer(s): 121