The number of $2, $10 and $100 notes in a piggy bank is in the ratio of 7 : 7 : 9. The notes are worth $11808 altogether. Find the total number of $2 and $10 notes.
|
$2 |
$10 |
$100 |
Total |
Number |
7 u |
7 u |
9 u |
|
Value |
$2 |
$10 |
$100 |
|
Total value |
14 u |
70 u |
900 u |
$11808 |
Total value of $2, $10 and $100 notes
= 14 u + 70 u + 900 u
= 984 u
984 u = 11808
1 u = 11808 ÷ 984 = 12
Number of $2 and $10 notes
= 7 u + 7 u
= 14 u
= 14 x 12
= 168
Answer(s): 168