The number of $5, $10 and $50 notes in a piggy bank is in the ratio of 6 : 7 : 3. The notes are worth $3000 altogether. Find the total number of $5 and $10 notes.
|
$5 |
$10 |
$50 |
Total |
Number |
6 u |
7 u |
3 u |
|
Value |
$5 |
$10 |
$50 |
|
Total value |
30 u |
70 u |
150 u |
$3000 |
Total value of $5, $10 and $50 notes
= 30 u + 70 u + 150 u
= 250 u
250 u = 3000
1 u = 3000 ÷ 250 = 12
Number of $5 and $10 notes
= 6 u + 7 u
= 13 u
= 13 x 12
= 156
Answer(s): 156