The number of $2, $5 and $20 notes in a piggy bank is in the ratio of 1 : 8 : 4. The notes are worth $1098 altogether. Find the total number of $2 and $5 notes.
| |
$2 |
$5 |
$20 |
Total |
| Number |
1 u |
8 u |
4 u |
|
| Value |
$2 |
$5 |
$20 |
|
| Total value |
2 u |
40 u |
80 u |
$1098 |
Total value of $2, $5 and $20 notes
= 2 u + 40 u + 80 u
= 122 u
122 u = 1098
1 u = 1098 ÷ 122 = 9
Number of $2 and $5 notes
= 1 u + 8 u
= 9 u
= 9 x 9
= 81
Answer(s): 81
