The number of $2, $50 and $100 notes in a piggy bank is in the ratio of 1 : 1 : 3. The notes are worth $2816 altogether. Find the total number of $2 and $50 notes.
| |
$2 |
$50 |
$100 |
Total |
| Number |
1 u |
1 u |
3 u |
|
| Value |
$2 |
$50 |
$100 |
|
| Total value |
2 u |
50 u |
300 u |
$2816 |
Total value of $2, $50 and $100 notes
= 2 u + 50 u + 300 u
= 352 u
352 u = 2816
1 u = 2816 ÷ 352 = 8
Number of $2 and $50 notes
= 1 u + 1 u
= 2 u
= 2 x 8
= 16
Answer(s): 16
