Task: Question Answering
Input (English): Problem: in one alloy there is 12 % chromium while in another alloy it is 8 % . 20 kg of the first alloy was melted together with 35 kg of the second one to form a third alloy . find the percentage of chromium in the new alloy . 
Options: a ) 9.45 % , b ) 10 % , c ) 15 % , d ) 20 % , e ) 25 %
Output (English): a