Task: Question Answering
Input (English): Problem: a class of 20 students took a science test . 10 students had an average ( arithmetic mean ) score of 80 . the other students had an average score of 60 . what is the average score of the whole class ? 
Options: a ) 70 , b ) 60 , c ) 55 , d ) 65 , e ) 85
Output (English): a