Question

In a class exactly 10% students get 70 marks, exactly 25% get 80 marks, exactly 15% get 85 marks, exactly 25% get 90 marks and remaining get 95 marks.What is the minimum number of students in the class if the avg. Of sum of marks is an even no.

Answer 1

Answer:

Step-by-step explanation:

Let total no. of students be x.

=> [x(10*70 + 25*80 + 15*85 + 25* 90 + 25*95)/100]/ x = 86

Here, the average is always 86 and does not depend upon the no. of students.

Hence the answer is the minimum value that is 20.