The number of $20, $50 and $100 notes in a piggy bank is in the ratio of 5 : 3 : 5. The notes are worth $3750 altogether. Find the total number of $20 and $50 notes.
| |
$20 |
$50 |
$100 |
Total |
| Number |
5 u |
3 u |
5 u |
|
| Value |
$20 |
$50 |
$100 |
|
| Total value |
100 u |
150 u |
500 u |
$3750 |
Total value of $20, $50 and $100 notes
= 100 u + 150 u + 500 u
= 750 u
750 u = 3750
1 u = 3750 ÷ 750 = 5
Number of $20 and $50 notes
= 5 u + 3 u
= 8 u
= 8 x 5
= 40
Answer(s): 40
