The number of $2, $10 and $20 notes in a piggy bank is in the ratio of 3 : 7 : 8. The notes are worth $2360 altogether. Find the total number of $2 and $10 notes.
|
$2 |
$10 |
$20 |
Total |
Number |
3 u |
7 u |
8 u |
|
Value |
$2 |
$10 |
$20 |
|
Total value |
6 u |
70 u |
160 u |
$2360 |
Total value of $2, $10 and $20 notes
= 6 u + 70 u + 160 u
= 236 u
236 u = 2360
1 u = 2360 ÷ 236 = 10
Number of $2 and $10 notes
= 3 u + 7 u
= 10 u
= 10 x 10
= 100
Answer(s): 100