Task: Question Answering
Input (English): Problem: the ratio of the number of females to males at a party was 1 : 2 but when 3 females and 3 males left , the ratio became 1 : 3 . how many people were at the party originally ? 
Options: a ) 14 , b ) 16 , c ) 18 , d ) 20 , e ) 22
Output (English): c