Let X be a random variable with the following probability distribution. Value x of X P (X=x) 1 0.05 0.85 3 0.05 4 0.05 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X) of X. E (x) = D |(b) Find the variance Var(X) of X. Var (x) = []

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Let X be a random variable with the following probability distribution.
Value x of X P(X=x)
0.05
2
0.85
3
0.05
4
0.05
Complete the following. (If necessary, consult a list of formulas.)
(a) Find the expectation E (X) of X.
?
Е (x) - ‑
(b) Find the variance Var(X) of X.
Var (X) = 0
Transcribed Image Text:Let X be a random variable with the following probability distribution. Value x of X P(X=x) 0.05 2 0.85 3 0.05 4 0.05 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X) of X. ? Е (x) - ‑ (b) Find the variance Var(X) of X. Var (X) = 0
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