Answer:
0
Step-by-step explanation:
In the roll of a pair of fair dice, The sample space is as follows:
(1,1)	(1,2)	(1,3)	(1,4)	(1,5)	(1,6)
(2,1)	(2,2)	(2,3)	(2,4)	(2,5)	(2,6)
(3,1)	(3,2)	(3,3)	(3,4)	(3,5)	(3,6)
(4,1)	(4,2)	(4,3)	(4,4)	(4,5)	(4,6)
(5,1)	(5,2)	(5,3)	(5,4)	(5,5)	(5,6)
(6,1)	(6,2)	(6,3)	(6,4)	(6,5)	(6,6)
If x,y represent  the  possible outcome of rolling the two die
 Then the total number of possibilities for  the sample space = (x,y) 
= (6 × 6) = 36
Now, the probability of getting a sum of 1 does not exist in the roll of a pair of  fair dice.
Therefore, Probability(1) = 0