Posted by chisom on Tuesday, March 1, 2011 at 11:51am.
there are 80 students in a math class.20% of the students in the class scored above 50 marks in the test. what is the average of those students who scored below 50 marks

statistics  PsyDAG, Tuesday, March 1, 2011 at 9:07pm
What are "50 marks"?
The average (mean) of the remaining 80% of students cannot be determined without more information.