At a school, there were 30 students from Club F and 10% more students from Club G. Some students from Club G left and the ratio of the number of students from Club F to the number of students from Club G became 3 : 2. How many students from Club G left?
| |
Club F |
Club G |
| Before |
30 |
33 |
| Change |
|
- ? |
| After |
3 u |
2 u |
Number of students from Club G at first in percent
= 100% + 10%
= 110%
Number of students from Club G at first
= 110% x 30
=
110100 x 30
= 33
Number of students in Club F remains unchanged.
3 u = 30
1 u = 30 ÷ 3 = 10
Number of students from Club G in the end
= 2 u
= 2 x 10
= 20
Number of students from Club G who left
= 33 - 20
= 13
Answer(s): 13
