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| $X$ | $-2$ | $-1$ | $0$ | $1$ | $2$ | $3$ |
| $P(X)$ | $0.1$ | $0.2$ | $0.2$ | $0.3$ | $0.15$ | $0.05$ |
| $x$ | $0$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|---|
| $P(x)$ | $k$ | $0.3$ | $0.15$ | $0.15$ | $0.1$ | $2k$ |
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