Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Mean of 100 observations is 45. It was later found that two observations 19 and 31 were incorrectly recorded as 91 and 13. The correct mean is
Text Solution
Verified by ExpertsThe correct answer is:
B
Sum of 100 items = 45×100 = 4500
Sum of items added = 19 +31 = 50
Sum of items replaced = 91+ 13 = 104
New sum = 
= 4446
∴ ∴ New mean 
= 44.46
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