The number of $2, $5 and $20 notes in a piggy bank is in the ratio of 8 : 3 : 9. The notes are worth $1477 altogether. Find the total number of $2 and $5 notes.
| |
$2 |
$5 |
$20 |
Total |
| Number |
8 u |
3 u |
9 u |
|
| Value |
$2 |
$5 |
$20 |
|
| Total value |
16 u |
15 u |
180 u |
$1477 |
Total value of $2, $5 and $20 notes
= 16 u + 15 u + 180 u
= 211 u
211 u = 1477
1 u = 1477 ÷ 211 = 7
Number of $2 and $5 notes
= 8 u + 3 u
= 11 u
= 11 x 7
= 77
Answer(s): 77
