The number of $2, $10 and $100 notes in a piggy bank is in the ratio of 3 : 1 : 3. The notes are worth $2528 altogether. Find the total number of $10 and $100 notes.
| |
$2 |
$10 |
$100 |
Total |
| Number |
3 u |
1 u |
3 u |
|
| Value |
$2 |
$10 |
$100 |
|
| Total value |
6 u |
10 u |
300 u |
$2528 |
Total value of $2, $10 and $100 notes
= 6 u + 10 u + 300 u
= 316 u
316 u = 2528
1 u = 2528 ÷ 316 = 8
Number of $10 and $100 notes
= 1 u + 3 u
= 4 u
= 4 x 8
= 32
Answer(s): 32
