In an envelope, there were a total of 80 notes. 60% of them were $1-notes. The rest were $2-notes. Asher took out some $1-notes. As a result, the remaining $1-notes made up 20% of the notes left in the envelope. Find the total value of the $1-notes Asher took out from the envelope.
| |
$1 |
$2 |
Total |
| Before |
3x2 =
6 u |
2x2 =
4 u |
5x2 =
10 u |
| Change |
- ? |
|
|
| After |
1x1 =
1 u |
4x1 =
4 u |
5x1 =
5 u |
60% =
60100 =
35
20% =
20100 =
15
The number of $2-notes remains unchanged. Make the number of $2-notes the same. LCM of 2 and 4 is 4.
Total number of notes at first = 10 u
10 u = 80
1 u = 80 ÷ 10 = 8
Number of $1-notes that Asher took out from the envelope
= 6 u - 1 u
= 5 u
= 5 x 8
= 40
Total value of $1-notes taken out
= 40 x 1
= $40
Answer(s): $40
