The number of $2, $5 and $10 notes in a piggy bank is in the ratio of 9 : 1 : 8. The notes are worth $1236 altogether. Find the total number of $5 and $10 notes.
|
$2 |
$5 |
$10 |
Total |
Number |
9 u |
1 u |
8 u |
|
Value |
$2 |
$5 |
$10 |
|
Total value |
18 u |
5 u |
80 u |
$1236 |
Total value of $2, $5 and $10 notes
= 18 u + 5 u + 80 u
= 103 u
103 u = 1236
1 u = 1236 ÷ 103 = 12
Number of $5 and $10 notes
= 1 u + 8 u
= 9 u
= 9 x 12
= 108
Answer(s): 108