Choose the correct answer from the given four options.
For the following probability distribution $E(X^2)$ is equal to:
| $\text{X}$ | $1$ | $2$ | $3$ | $4$ |
| $\text{P}(\text{X})$ | $\frac{1}{10}$ | $\frac{1}{5}$ | $\frac{3}{10}$ | $\frac{2}{5}$ |
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