Task: Question Answering
Input (English): Problem: the ratio of investments of two partners p and q is 7 : 5 and the ratio of their profits is 7 : 10 . if p invested the money for 10 months , find for how much time did q invest the money ? 
Options: a ) 11 , b ) 10 , c ) 20 , d ) 16 , e ) 12
Output (English): c