Question: Suppose that X is a random variable such that E(Xk) exists and Pr(X 0) = 1. Prove that for k > 0 and t

Suppose that X is a random variable such that E(Xk) exists and Pr(X ≥ 0) = 1. Prove that for k > 0 and t > 0,
Pr(X ≥ t) ≤ E(Xk)/tk.

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