The mean of 20 observations is 54 if one observation 42 ismisread as – InterviewSolution

1.	The mean of 20 observations is 54 if one observation 42 ismisread as 24 Find the need newmean
Answer» MEAN = No of observation number of observation are 20 and mean is 54 So, SUM of observation is 54 x 20 = 1080 So, correct mean = number of observation So, 1080-24+42÷20. = 1056+42÷20. =1098÷20. =54.9

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