The number of $2, $5 and $10 notes in a piggy bank is in the ratio of 4 : 5 : 9. The notes are worth $1107 altogether. Find the total number of $5 and $10 notes.
| |
$2 |
$5 |
$10 |
Total |
| Number |
4 u |
5 u |
9 u |
|
| Value |
$2 |
$5 |
$10 |
|
| Total value |
8 u |
25 u |
90 u |
$1107 |
Total value of $2, $5 and $10 notes
= 8 u + 25 u + 90 u
= 123 u
123 u = 1107
1 u = 1107 ÷ 123 = 9
Number of $5 and $10 notes
= 5 u + 9 u
= 14 u
= 14 x 9
= 126
Answer(s): 126
