The number of $10, $50 and $100 notes in a piggy bank is in the ratio of 2 : 6 : 7. The notes are worth $8160 altogether. Find the total number of $10 and $50 notes.
|
$10 |
$50 |
$100 |
Total |
Number |
2 u |
6 u |
7 u |
|
Value |
$10 |
$50 |
$100 |
|
Total value |
20 u |
300 u |
700 u |
$8160 |
Total value of $10, $50 and $100 notes
= 20 u + 300 u + 700 u
= 1020 u
1020 u = 8160
1 u = 8160 ÷ 1020 = 8
Number of $10 and $50 notes
= 2 u + 6 u
= 8 u
= 8 x 8
= 64
Answer(s): 64