A coin and a six-sided die are thrown simultaneously. The random variable X is defined as follows: if the coin shows a head, then X is the score on the die; if the coin shows a tail, then X is twice the score on the die. a Find the expected value, μ, of X. b Find Pr(X<μ). c Find Var(X).

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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A coin and a six-sided die are thrown simultaneously. The random variable X is defined as
follows: if the coin shows a head, then X is the score on the die; if the coin shows a tail,
then X is twice the score on the die.
a Find the expected value, μ, of X.
b Find Pr(X< µ).
c Find Var(X).
Transcribed Image Text:A coin and a six-sided die are thrown simultaneously. The random variable X is defined as follows: if the coin shows a head, then X is the score on the die; if the coin shows a tail, then X is twice the score on the die. a Find the expected value, μ, of X. b Find Pr(X< µ). c Find Var(X).
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