Task: Question Answering
Input (English): Problem: in an examination , a pupil ’ s average marks were 63 per paper . if he had obtained 20 more marks for his geography paper and 2 more marks for his history paper , his average per paper would have been 65 . how many papers were there in the examination ? 
Options: a ) 8 , b ) 9 , c ) 10 , d ) 11 , e ) 12
Output (English): d