The mean of 40 observations was 36. It was found later that an observation 34 was wrongly taken as 20. The corrected new mean is Answers:
A) 76.55
B) 36.35
C) 46.15
D) 16.05
E) 20

Rationale: "explanation : correct sum = ( 36 * 40 + 34 - 20 ) = 1454 correct mean = = 1454 / 40 = 36.35 answer : b"
Answer: B