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: the element being searched for is not found in an array of 100 elements . what is the average number of comparisons needed in a sequential search to determine that the element is not there , if the elements are completely unordered ?
Options: a ) 25 , b ) 50 , c ) 75 , d ) 100 , e ) 125

Output: d

Input: Consider Input: Problem: the average of 5 numbers is 27 . if one number is excluded the average become 25 . the excluded number is :
Options: a ) 25 , b ) 27 , c ) 30 , d ) 35 , e ) 37

Output: d

Input: Consider Input: Problem: a number when divided by 221 gives a remainder 43 , what remainder will be obtained by dividing the same number 17 ?
Options: a ) 9 , b ) 11 , c ) 15 , d ) 5 , e ) 20
Output: a