The number of $2, $5 and $50 notes in a piggy bank is in the ratio of 7 : 8 : 1. The notes are worth $728 altogether. Find the total number of $2 and $5 notes.
| |
$2 |
$5 |
$50 |
Total |
| Number |
7 u |
8 u |
1 u |
|
| Value |
$2 |
$5 |
$50 |
|
| Total value |
14 u |
40 u |
50 u |
$728 |
Total value of $2, $5 and $50 notes
= 14 u + 40 u + 50 u
= 104 u
104 u = 728
1 u = 728 ÷ 104 = 7
Number of $2 and $5 notes
= 7 u + 8 u
= 15 u
= 15 x 7
= 105
Answer(s): 105
