The mean of 50 observations was 36. It was found later that an observation 44 was wrongly taken as 23. The corrected new mean is Choose the correct choice
A) 35.22 B) 36.12 C) 36.22 D) 36.42 E) none

Rationale: "solution correct sum = ( 36 x 50 + 44 - 23 ) = 1821 . â ˆ ´ correct mean = 1821 / 50 = 36.42 . answer d"
Answer: D