Task: Question Answering
Input (English): Problem: solution x is 10 percent alcohol by volume , and solution y is 30 percent alcohol by volume . how many milliliters of solution y must be added to 300 milliliters of solution x to create a solution that is 15 percent alcohol by volume ? 
Options: a ) 50 , b ) 100 , c ) 150 , d ) 200 , e ) 250
Output (English): b