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 the most appropriate option:
A) 35.2  B) 36.1  C) 36.2  D) 36.5  E) None
Solution   Correct sum	= (36x50+48-23)   = 1825.   ∴ Correct mean	= 1825 / 50   = 36.5.   Answer 36.5
<result>D</result>
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