Expected Value, Variance And Standard Deviation
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The probability distribution of the random variable \(X\) is given in the following table. The expected value of the variable \(X\) is?
\[\begin{array}{|c|c|c|c|c|}
\hline \boldsymbol{x} & 0 & 1 & 2 & 3 \\
\hline \mathrm{P}(\mathrm{X}=x) & 0.2 & 0.3 & 0.2 & 0.3 \\
\hline
\end{array}\]
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