Answer to Question #119689 in Statistics and Probability for Arafeen

Question #119689

(A5). A random variable X has Poisson distribution with mean equal to 0.4. What is the probability that the random variable is greater than zero?

Expert's answer

"\\lambda =0.4\\\\\nP(X>0)=1-P(X=0)\\\\\n=1-\\frac{e^{-0.4}(0.4)^{0}}{0!}=1-0.0.67=0.33"

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