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

Ex Input:
Problem: how many positive integers less than 300 can be formed using the numbers 1 , 2 , 3 a for the digits ?
Options: a ) 30 , b ) 52 , c ) 66 , d ) 68 , e ) 84

Ex Output:
a

Ex Input:
Problem: there is a 30 % chance jen will visit chile this year , while there is a 50 % chance that she will visit madagascar this year . what is the probability that jen will visit either chile or madagascar this year , but not both ?
Options: a ) 25.0 % , b ) 37.5 % , c ) 50.0 % , d ) 62.5 % , e ) 75 %

Ex Output:
c

Ex Input:
Problem: how many cubes of 2 cm edge can be cut out of a cube of 24 cm edge
Options: a ) 1136 , b ) 1728 , c ) 1216 , d ) 1484 , e ) none of these

Ex Output:
b