A pupil's marks were wrongly entered as 83 instead of 63. Due to that the averag

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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 $$\frac{1}{2}$$ . The number of pupils in the class is:

Options:

A . 10

B . 20

C . 40

D . 73

Answer: Option C

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