Task: Question Answering
Input (English): Problem: the average marks of a class of 24 students is 40 and that of another class of 50 students is 60 . find the average marks of all the students ? 
Options: a ) 52.2 , b ) 59.5 , c ) 52.8 , d ) 53.5 , e ) 52.1
Output (English): d