A box contains 3 orange balls, 3 green balls and 2 blue balls. Three balls are drawn at random from the box without replacement. The probability of drawing 22 green balls and one blue ball is
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The value of $E(X^2)$ is:$\text{X}:$$1$$2$$3$$4$$\text{P}(\text{X}):$$\frac{1}{10}$$\frac{1}{5}$$\frac{3}{10}$$\frac{2}{5}$