Let X be a random variable with the probability function following table \begin{tabular}{c|cccc} X & 1 & 2 & 3 & 4 \\ \hline f(x) & 0.4 & 0.3 & 0.2 & 0.1 \\ \end{tabular} Find E(X), E(1/X) and Var(X).
Added by Christopher M.
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Expected value of X (E(X)): E(X) = Σ(x*f(x)) for all possible values of X E(X) = (0*0.033) + (1*0.2) + (2*0.1) E(X) = 0 + 0.2 + 0.2 E(X) = 0.4 Show more…
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