in a village the average age of n people is 42 years. but after the verificati

Question

in a village the average age of n people is 42 years. but after the verification it was found that the age of a person had been considered 20 years less than the actual age, so the new average, after

Options:

A . 21

B . 20

C . 22

D . None of these

Answer: Option B
Explanation :

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