Task: Question Answering
Input (English): Problem: 3 sets of 40 , 50 and 60 students appeared for an examination and the pass percentage was 100 , 90 and 80 respectively . the pass percentage of the whole set is 
Options: a ) 88.33 , b ) 84.33 , c ) 88.66 , d ) 84.66 , e ) none of these
Output (English): c