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Saurabh was asked to find the average of first 'n' natural numbers. By mistake, he added a number twice............

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Saurabh was asked to find the average of first 'n' natural numbers.
By mistake, he added a number twice but he didn't noticed it.
As a result, he obtained a wrong average of 31.3.
Find the number he added twice?

posted Sep 16, 2022 by Atif

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