In a class of 20 students in an examination in Mathematics 2 students scored 100 Marks each, 3 get zero each and the average of the rest was 40.
What is the average Of the whole class?
Ans:Avg of whole class is 40
2 students get 100 marks, then 2* 100 = 200
3 students get 0 marks , then 3* 0 = 0
15 students get 40 (average) marks, then 15 * 40 = 600
Solution : (200 + 0 + 600) / 20 = 40
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