The number of $2, $20 and $50 notes in a piggy bank is in the ratio of 6 : 9 : 7. The notes are worth $2710 altogether. Find the total number of $2 and $20 notes.
|
$2 |
$20 |
$50 |
Total |
Number |
6 u |
9 u |
7 u |
|
Value |
$2 |
$20 |
$50 |
|
Total value |
12 u |
180 u |
350 u |
$2710 |
Total value of $2, $20 and $50 notes
= 12 u + 180 u + 350 u
= 542 u
542 u = 2710
1 u = 2710 ÷ 542 = 5
Number of $2 and $20 notes
= 6 u + 9 u
= 15 u
= 15 x 5
= 75
Answer(s): 75