1. The mean of 50 numbers is 30. Later it was discoverd that two entries were wrongly entered as 82 and 13 instead of 28 and 31. Find the correct mean.
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By: anil on 05 May 2019 02.00 am
average = $$frac{Sum}{NumberofElements}$$ it is given that mean of 50 numbers = 30 Sum of 50 numbers = 50 x 30 = 1500 Corrected Sum = 1500 - (82 + 13) + (28 + 31) = 1464 New and corrected average = $$frac{1464}{50}$$ = 29.28
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