The number of $2, $5 and $20 notes in a piggy bank is in the ratio of 1 : 7 : 8. The notes are worth $1576 altogether. Find the total number of $5 and $20 notes.
| |
$2 |
$5 |
$20 |
Total |
| Number |
1 u |
7 u |
8 u |
|
| Value |
$2 |
$5 |
$20 |
|
| Total value |
2 u |
35 u |
160 u |
$1576 |
Total value of $2, $5 and $20 notes
= 2 u + 35 u + 160 u
= 197 u
197 u = 1576
1 u = 1576 ÷ 197 = 8
Number of $5 and $20 notes
= 7 u + 8 u
= 15 u
= 15 x 8
= 120
Answer(s): 120
