The mean of 50 observations was 36. It was found later that an observation 28 was wrongly taken as 23. The corrected new mean is :  Answers:
A) 36.0
B) 36.5
C) 36.1
D) 36.2
E) 36.8

Rationale: "explanation : correct sum = ( 36 * 50 + 28 - 23 ) = 1825 . correct mean = = 1805 / 50 = 36.1 answer : c ) 36.1"
Answer: C