The distribution of a random variable $X$ is given below:
$X = x$$-2$$-1$$0$$1$$2$$3$
$P(X = x)$$\frac{1}{10}$$k$$\frac{1}{5}$$2k$$\frac{3}{10}$$k$

The value of $k$ is:

  • A
    $\frac{1}{10}$
  • B
    $\frac{2}{10}$
  • C
    $\frac{3}{10}$
  • D
    $\frac{7}{10}$

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