Question

assign probability values P(X) to each of the random variable

Answer 1

 Let X be the outcome of the roll of a die.

Then X is a random variable.

Its possible values are 1, 2, 3, 4, 5, and 6

Each of these possible values has probability

$P(1)=P(2)=P(3)=P(4)=P(5)=P(6)= \dfrac{1}{6}$