Task: Question Answering
Input (English): Problem: 40 liters of a mixture is created by mixing liquid p and liquid q in the ratio 5 : 3 . how many liters of liquid q must be added to make the ratio 5 : 6 ? 
Options: a ) 5 , b ) 8 , c ) 10 , d ) 12 , e ) 15
Output (English): e