| $X = x$ | $0$ | $1$ | $2$ | $3$ |
|---|---|---|---|---|
| $P(X = x)$ | $\frac{1}{10}$ | $\frac{2}{10}$ | $\frac{3}{10}$ | $\frac{4}{10}$ |
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| $X$ | $0$ | $1$ | $2$ | $3$ | $4$ |
| $P(X=x)$ | $2k$ | $k$ | $2k$ | $4k$ | $k$ |
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