The number of $5, $10 and $100 notes in a piggy bank is in the ratio of 1 : 1 : 7. The notes are worth $5005 altogether. Find the total number of $5 and $10 notes.
|
$5 |
$10 |
$100 |
Total |
Number |
1 u |
1 u |
7 u |
|
Value |
$5 |
$10 |
$100 |
|
Total value |
5 u |
10 u |
700 u |
$5005 |
Total value of $5, $10 and $100 notes
= 5 u + 10 u + 700 u
= 715 u
715 u = 5005
1 u = 5005 ÷ 715 = 7
Number of $5 and $10 notes
= 1 u + 1 u
= 2 u
= 2 x 7
= 14
Answer(s): 14