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

[Q]: Problem: if two integers x , y ( x > y ) are selected from - 10 to 1 ( inclusive ) , how many possible cases are there ? 
Options: a ) 150 , b ) 66 , c ) 190 , d ) 210 , e ) 240
[A]: b


[Q]: Problem: in a throw of a coin find the probability of getting a head ? 
Options: a ) 1 / 2 , b ) 1 / 3 , c ) 1 / 4 , d ) 2 / 3 , e ) 2 / 5
[A]: a


[Q]: Problem: on a windy day , out of every 3 sand dunes formed , only 1 remains . out of 5 blown - out sand - dunes , 1 has treasure and only 2 out of 3 sand dunes formed have lucky coupons . find the probability that the blown - out sand dune will contain both the things . 
Options: a ) 2 / 25 , b ) 4 / 75 , c ) 7 / 75 , d ) 3 / 5 , e ) 4 / 45
[A]:
e