In a basketball court,
14 of the students wore scarves. After 10 students who wore scarves left the basketball court, the percentage of students who wore scarves decreased to 10%. How many students in the basketball court did not wear scarves?
|
Wore scarves |
Did not wear scarves |
Before |
1x3 = 3 u |
3x3 = 9 u |
Change |
- 10 |
|
After |
1x1 = 1 u |
9x1 = 9 u |
10% =
10100 =
110The number of students who did not wear scarves remains unchanged. LCM of 3 and 9 is 9.
Number of students who wore scarves and left
= 3 u - 1 u
= 2 u
2 u = 10
1 u = 10 ÷ 2 = 5
Number of students who did not wear scarves
= 9 u
= 9 x 5
= 45
Answer(s): 45