# Thread: Hey guys, quick question on discrete random variables

1. ## Hey guys, quick question on discrete random variables

x -1 0 1/2 1

p X(x) 1/8 1/8 1/4 1/2

(a) Calculate
P(X = 3/4) + FX(3/4).

Does P (X= 3/4) = 0 and Fx(3/4) = 1/2 so the answer would be a half?

2. ## Re: Hey guys, quick question on discrete random variables

Originally Posted by MathJack
x -1 0 1/2 1

p X(x) 1/8 1/8 1/4 1/2

(a) Calculate
P(X

= 3/4) + FX(3/4).

Does P (X= 3/4) = 0 and Fx(3/4) = 1/2 so the answer would be a half?

If the notation $F_X$ is the cumulative distribution then that is correct.