Task: Question Answering
Input (English): Problem: a man buys 10 lts of liquid which contains 20 % of the liquid and the rest is water . he then mixes it with 15 lts of another mixture with 30 % of liquid . what is the % of water in the new mixture ? 
Options: a ) 74 , b ) 84 , c ) 94 , d ) 49 , e ) 47
Output (English): a