The number of $2, $5 and $50 notes in a piggy bank is in the ratio of 7 : 5 : 4. The notes are worth $1912 altogether. Find the total number of $2 and $5 notes.
| |
$2 |
$5 |
$50 |
Total |
| Number |
7 u |
5 u |
4 u |
|
| Value |
$2 |
$5 |
$50 |
|
| Total value |
14 u |
25 u |
200 u |
$1912 |
Total value of $2, $5 and $50 notes
= 14 u + 25 u + 200 u
= 239 u
239 u = 1912
1 u = 1912 ÷ 239 = 8
Number of $2 and $5 notes
= 7 u + 5 u
= 12 u
= 12 x 8
= 96
Answer(s): 96
