The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is :  Choose one.
A) 36.5 B) 35 C) 34 D) 33 E) 32.5

Rationale: "correct sum = ( 36 * 50 + 48 - 23 ) = 1825 . correct mean = 1825 / 50 = 36.5 answer a"
Answer: A