The number of $2, $10 and $50 notes in a piggy bank is in the ratio of 2 : 2 : 5. The notes are worth $1644 altogether. Find the total number of $2 and $10 notes.
|
$2 |
$10 |
$50 |
Total |
Number |
2 u |
2 u |
5 u |
|
Value |
$2 |
$10 |
$50 |
|
Total value |
4 u |
20 u |
250 u |
$1644 |
Total value of $2, $10 and $50 notes
= 4 u + 20 u + 250 u
= 274 u
274 u = 1644
1 u = 1644 ÷ 274 = 6
Number of $2 and $10 notes
= 2 u + 2 u
= 4 u
= 4 x 6
= 24
Answer(s): 24