The number of $2, $5 and $20 notes in a piggy bank is in the ratio of 8 : 3 : 5. The notes are worth $655 altogether. Find the total number of $5 and $20 notes.
|
$2 |
$5 |
$20 |
Total |
Number |
8 u |
3 u |
5 u |
|
Value |
$2 |
$5 |
$20 |
|
Total value |
16 u |
15 u |
100 u |
$655 |
Total value of $2, $5 and $20 notes
= 16 u + 15 u + 100 u
= 131 u
131 u = 655
1 u = 655 ÷ 131 = 5
Number of $5 and $20 notes
= 3 u + 5 u
= 8 u
= 8 x 5
= 40
Answer(s): 40