The following table represents the probability distribution of a random variable $X$ for some $k \in Q$. Find the value of $k$.
$X=x$ $-2$ $-1$ $0$ $1$ $2$ $3$ $P(X=x)$ $0.1$ $k$ $0.2$ $2k$ $0.3$ $k$
| $X=x$ | $-2$ | $-1$ | $0$ | $1$ | $2$ | $3$ |
| $P(X=x)$ | $0.1$ | $k$ | $0.2$ | $2k$ | $0.3$ | $k$ |
- A$0.25$
- B$0.2$
- C$0.15$
- D$0.1$
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