Task: Question Answering
Input (English): Problem: in a certain accounting class of 100 students , 70 % of the students took the final exam on the assigned day while the rest of the students took the exam on a make - up date . if the students on the assigned day had an average score of 60 % , and the students on the make - up date had an average score of 90 % , what was the average score for the entire class ? 
Options: a ) 65 % , b ) 67 % , c ) 69 % , d ) 72 % , e ) 75 %
Output (English): c