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Counting & probability

Expected value

1 / 5Standard

Find the expected value E(X) of the random variable X.

X0120300P121316\begin{array}{c|ccc} X & 0 & 120 & 300 \\ \hline P & \frac{1}{2} & \frac{1}{3} & \frac{1}{6} \end{array}