The number of $2, $20 and $100 notes in a piggy bank is in the ratio of 4 : 5 : 5. The notes are worth $3040 altogether. Find the total number of $2 and $20 notes.
| |
$2 |
$20 |
$100 |
Total |
| Number |
4 u |
5 u |
5 u |
|
| Value |
$2 |
$20 |
$100 |
|
| Total value |
8 u |
100 u |
500 u |
$3040 |
Total value of $2, $20 and $100 notes
= 8 u + 100 u + 500 u
= 608 u
608 u = 3040
1 u = 3040 ÷ 608 = 5
Number of $2 and $20 notes
= 4 u + 5 u
= 9 u
= 9 x 5
= 45
Answer(s): 45
