The mean of 20 observations is 15, On checking it was found that two o – McqOptions

MCQOPTIONS

1.	The mean of 20 observations is 15, On checking it was found that two observations were wrongly copied as 3 and 6. If wrong observations are replaced by correct values 8 and 4, then the correct mean is?
A.	15
B.	15.15
C.	15.35
D.	16
Answer» C. 15.35

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