Task: Question Answering
Input (English): Problem: if 15 students in a class average 70 % on an exam and 10 students average 90 % on the same exam , what is the average in percent for all 25 students ? 
Options: a ) 78 % , b ) 79 % , c ) 80 % , d ) 81 % , e ) 82 %
Output (English): a