Task: Question Answering
Input (English): Problem: the mean of 50 observations was 36 . it was found later that an observation 29 was wrongly taken as 23 . the corrected new mean is : 
Options: a ) 36.1 , b ) 36.5 , c ) 36.22 , d ) 36.12 , e ) 36.18
Output (English): d