GyanOne wrote:
Assume that the total number of students is 100.
=> 20 students got permission from their parents, 40 students are 4th graders, and 10 of the 4th graders got permission from their parents
=> 30 of the 5th graders got written permission
=> 30 of the 5th graders did not get written permission (there are 60 students who are 5th graders)
=> 50% of the 5th graders didn't get permission
Option (C)
=> 20 students got permission from their parents, 40 students are 4th graders, and 10 of the 4th graders got permission from their parents
=> 30 of the 5th graders got written permission
=> 30 of the 5th graders did not get written permission (there are 60 students who are 5th graders)
=> 50% of the 5th graders didn't get permission
Option (C)
This cant be true.
If you assume total of 100 students, we are given that only 20% have the written permission.
This means only 20 students have the written permission from parents.
Of the 20 students with permission 10 (25%) are 4th graders, which means there are only 10 students left.
So 10 students are 5th graders who have permission.
Where do you get 30 5th graders from?
30 5th graders is basically 50% of 5th graders out of 100 you are assuming, which we are not told.. so..????
Any comments?