The number of $2, $5 and $100 notes in a piggy bank is in the ratio of 3 : 4 : 9. The notes are worth $5556 altogether. Find the total number of $2 and $5 notes.
| |
$2 |
$5 |
$100 |
Total |
| Number |
3 u |
4 u |
9 u |
|
| Value |
$2 |
$5 |
$100 |
|
| Total value |
6 u |
20 u |
900 u |
$5556 |
Total value of $2, $5 and $100 notes
= 6 u + 20 u + 900 u
= 926 u
926 u = 5556
1 u = 5556 ÷ 926 = 6
Number of $2 and $5 notes
= 3 u + 4 u
= 7 u
= 7 x 6
= 42
Answer(s): 42
