Task: Question Answering
Input (English): Problem: how many kg of rice at rs . 6.60 per kg . be mixed with 56 kg of rice at rs . 9.60 per kg to get a mixture worth rs . 8.20 per kg 
Options: a ) 56 kg , b ) 52 kg , c ) 44 kg , d ) 49 kg , e ) none of these
Output (English): d