The mean of 50 observations was 36. It was found later that an observation 47 was wrongly taken as 23. The corrected new mean is Choices
A) 35.24 B) 36.16 C) 36.22 D) 36.48 E) none

Rationale: "solution correct sum = ( 36 x 50 + 47 - 23 ) = 1824 . â ˆ ´ correct mean = 1824 / 50 = 36.48 . answer d"
Answer: D