The discrete random variable X takes values 1,2 and 4 with probabilities P(X=1)=0.5,P(X=2)=0.3,
and P(X=4)=0.2. What is E(X), the expected value of X? 1.5 1.3 None of the listed values 1.9 1.7.
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The discrete random variable X takes values 12 and 4 with p.pdf
1. The discrete random variable X takes values 1,2 and 4 with probabilities P(X=1)=0.5,P(X=2)=0.3,
and P(X=4)=0.2. What is E(X), the expected value of X? 1.5 1.3 None of the listed values 1.9 1.7