In this task, you need to provide the correct option for a given problem on probability from the provided options.
One example: Problem: in a throw of a coin find the probability of getting a tail ? 
Options: a ) 1 / 2 , b ) 1 / 3 , c ) 1 / 4 , d ) 2 / 5 , e ) 2 / 7
Solution is here: a
Explanation: "s = { h , t } e = { t } p ( e ) = 1 / 2 answer is a"

Now, solve this: Problem: a , b , c , d , e , f , g , h sitting in a row what is the probability that a , b , c sitting together ? 
Options: a ) 3 / 14 , b ) 5 / 28 , c ) 3 / 28 , d ) 1 / 7 , e ) 9 / 28
Solution:
c