In this task, you need to provide the correct option for a given problem from the provided options.

Input: Consider Input: Problem: the probability of two events a and b are 0.25 and 0.40 respectively . the probability that both a and b occur is 0.20 . the probability that neither a nor b occur is _________ 
Options: a ) 0.45 , b ) 0.4 , c ) 0.55 , d ) 0.05 , e ) 0.6

Output: c


Input: Consider Input: Problem: rajat , vikas and abhishek are submitting questions in the ratio 7 : 3 : 2 . if total number of questions submitted by them is 24 . find the number of questions submitted by vikas . 
Options: a ) 3 , b ) 4 , c ) 5 , d ) 6 , e ) 7

Output: d


Input: Consider Input: Problem: if s and t are both odd prime numbers ands < t , then how many different positive integer factors does 2 sthave ? 
Options: a ) 3 , b ) 4 , c ) 6 , d ) 8 , e ) 12


Output: d