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| $X = x_i$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ |
| $P(X = x_i)$ | $10k$ | $9k$ | $8k$ | $8k$ | $6k$ | $5k$ | $4k$ | $3k$ | $k$ |
| $X = x$ | $0$ | $1$ | $2$ | $3$ |
|---|---|---|---|---|
| $P(X = x)$ | $\frac{1}{10}$ | $\frac{2}{10}$ | $\frac{3}{10}$ | $\frac{4}{10}$ |
| $X = x$ | $0$ | $1$ | $2$ |
| $P(X = x)$ | $\frac{1}{5}$ | $\frac{2}{5}$ | $\frac{2}{5}$ |
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