The mean of 100 observations was calculates as 35. It was found later on that one of the observations was misread as 73 instead of 37. The correct mean is

A) 33.64

B) 34.64

C) 32.64

D) 64.34

Correct answer:
B) 34.64

Description for Correct answer:
Correct sum = (35 X 100 + 37 - 73) = 3464
Correct mean = 3464 / 100 = 34.64



Please provide the error details in above question