The number of $2, $5 and $10 notes in a piggy bank is in the ratio of 4 : 2 : 5. The notes are worth $340 altogether. Find the total number of $5 and $10 notes.
| |
$2 |
$5 |
$10 |
Total |
| Number |
4 u |
2 u |
5 u |
|
| Value |
$2 |
$5 |
$10 |
|
| Total value |
8 u |
10 u |
50 u |
$340 |
Total value of $2, $5 and $10 notes
= 8 u + 10 u + 50 u
= 68 u
68 u = 340
1 u = 340 ÷ 68 = 5
Number of $5 and $10 notes
= 2 u + 5 u
= 7 u
= 7 x 5
= 35
Answer(s): 35
