Discrete random variable - probability function

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Discrete random variable - probability function

Post by MathsTutor4You on Mon Sep 07, 2015 10:47 am

The discrete random variable X has the probability function


where k is a constant.

(a) Show that k=

(b) Find the exact value of F(5).

(c) Find the exact value of E(X).

(d) Find the exact value of E(X2).

(e) Calculate Var(3-4X) giving your answer to 3 significant figures.
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