The probability distribution of a discrete random variable $X$ is given below:
The value of $E(X^2)$ is:
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$\text{X}:$
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$1$
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$2$
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$3$
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$4$
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$\text{P}(\text{X}):$
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$\frac{1}{10}$
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$\frac{1}{5}$
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$\frac{3}{10}$
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$\frac{2}{5}$
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