Definition: In this task, you need to provide the correct option for a given problem on probability from the provided options.
Input: Problem: three 6 faced dice are thrown together . the probability that exactly two dice show the same number on them is 
Options: a ) 5 / 15 , b ) 5 / 12 , c ) 5 / 19 , d ) 5 / 12 , e ) 5 / 11
Output:
b