The number of $5, $10 and $50 notes in a piggy bank is in the ratio of 9 : 1 : 9. The notes are worth $5050 altogether. Find the total number of $10 and $50 notes.
|
$5 |
$10 |
$50 |
Total |
Number |
9 u |
1 u |
9 u |
|
Value |
$5 |
$10 |
$50 |
|
Total value |
45 u |
10 u |
450 u |
$5050 |
Total value of $5, $10 and $50 notes
= 45 u + 10 u + 450 u
= 505 u
505 u = 5050
1 u = 5050 ÷ 505 = 10
Number of $10 and $50 notes
= 1 u + 9 u
= 10 u
= 10 x 10
= 100
Answer(s): 100