Multiple Choice Questions on A pupil 39 s marks were wrongly entered as 83 instead of 63 Due to that the average marks for the cl........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A pupil 39 s marks were wrongly entered as 83 instead of 63 Due to that the average marks for the cl...........

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A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half. The number of pupils in the class is :

30

Incorrect Answer

35

Incorrect Answer

40

Correct Answer

42

Incorrect Answer
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Explanation:

Let there be x pupils in the class.
Total increase in marks = (x * 1/2) = x/2.
x/2 = (83 - 63) => x/2 = 20 => x = 40.

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