The number of $2, $10 and $100 notes in a piggy bank is in the ratio of 6 : 2 : 7. The notes are worth $6588 altogether. Find the total number of $10 and $100 notes.
|
$2 |
$10 |
$100 |
Total |
Number |
6 u |
2 u |
7 u |
|
Value |
$2 |
$10 |
$100 |
|
Total value |
12 u |
20 u |
700 u |
$6588 |
Total value of $2, $10 and $100 notes
= 12 u + 20 u + 700 u
= 732 u
732 u = 6588
1 u = 6588 ÷ 732 = 9
Number of $10 and $100 notes
= 2 u + 7 u
= 9 u
= 9 x 9
= 81
Answer(s): 81