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: a , b and c started a business with a total investment of rs . 90000 . a invests rs . 6000 more than b and b invests rs . 3000 less than c . if the total profit at the end of a year is rs . 8640 , find b ' s share . 
Options: a ) rs . 2592 , b ) rs . 2520 , c ) rs . 2880 , d ) rs . 3360 , e ) none of these

Output: a


Input: Consider Input: Problem: if ( 1 – 1.5 ) n = 1 , then n = 
Options: a ) − 400 , b ) − 140 , c ) − 2 , d ) 4 , e ) 400

Output: c


Input: Consider Input: Problem: the average of first 10 natural numbers is ? 
Options: a ) 5.6 , b ) 5.5 , c ) 5.1 , d ) 5.8 , e ) 5.2


Output: b