The number of $2, $20 and $50 notes in a piggy bank is in the ratio of 7 : 1 : 8. The notes are worth $3472 altogether. Find the total number of $2 and $20 notes.
| |
$2 |
$20 |
$50 |
Total |
| Number |
7 u |
1 u |
8 u |
|
| Value |
$2 |
$20 |
$50 |
|
| Total value |
14 u |
20 u |
400 u |
$3472 |
Total value of $2, $20 and $50 notes
= 14 u + 20 u + 400 u
= 434 u
434 u = 3472
1 u = 3472 ÷ 434 = 8
Number of $2 and $20 notes
= 7 u + 1 u
= 8 u
= 8 x 8
= 64
Answer(s): 64
