In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Input: Consider Input: Problem: if the average ( arithmetic mean ) of a and b is 110 , and the average of b and c is 170 , what is the value of a − c ? 
Options: a ) − 120 , b ) − 100 , c ) 100 , d ) 135 , e ) it can not be determined from the information given

Output: a


Input: Consider Input: Problem: dacid obtained 96 , 95 , 82 , 87 and 92 marks ( out of 100 ) in english , mathematics , physics , chemistry and biology . what are his average marks ? 
Options: a ) 67 , b ) 26 , c ) 87 , d ) 26 , e ) 90

Output: e


Input: Consider Input: Problem: the average of 5 quantities is 10 . the average of 3 of them is 4 . what is the average of remaining 2 numbers ? 
Options: a ) 19 , b ) 14 , c ) 8 , d ) 9.5 , e ) none of these


Output: a