The mean of 50 observations was 36. It was found later that an observation 60 was wrongly taken as 23. The corrected new mean is?  Choose the correct choice from the following options:  A) 36.7  B) 36.1  C) 36.5  D) 36.9  E) 36.3

Rationale: "correct sum = ( 36 * 50 + 60 - 23 ) = 1837 . correct mean = 1837 / 50 = 36.7 answer : a"
Answer: A