What was The Average Marks of The Remaining Students of the Class :

In a History examination, the average for the entire class was 80 marks. If 10% of the students scored 95 marks and 20% scored 90 marks. What was the average marks of the remaining students of the class:

  1. 65.5
  2. 85
  3. 75
  4. None of these
Anurag Mishra Professor Asked on 8th October 2015 in Maths.
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1 Answer(s)

Answer: (3) 75

Explanation:-
Let the number of students in the class be 100 and the average marks of remaining students be X
According to the question,
Then,  95 x 10 + 90 x 20 + 70 x X = 100 x 80
950 + 1800 + 70 X = 8000
70 X = 8000 – 2750
70 X = 5250
X = 5250/70
X = 75%
Then, the average marks of the remaining students of the class is 75.

Hence, the answer is (3) 75.

Anurag Mishra Professor Answered on 11th October 2015.
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