Task: Question Answering
Input (English): Problem: how many kilograms of sugar costing rs . 9 per kg must be mixed with 27 kg of sugar costing rs . 7 per kg so that there may be a gain of 10 % by selling the mixture at rs . 9.24 per kg ? 
Options: a ) 33 , b ) 39 , c ) 38 , d ) 63 , e ) 01
Output (English): d