The mean of 50 observations was 32. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is
Choices
A) 35.2  B) 32.5  C) 36.5  D) 39.1  E) none

Rationale: "sol . therefore correct sum = ( 32 × 50 + 48 – 23 ) = 1625 . therefore correct mean = 1625 / 50 = 32.5 . answer b"
Answer: B