| $x$ | $0$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ |
| $P(X=x)$ | $0$ | $k$ | $2k$ | $2k$ | $3k$ | $k^2$ | $2k^2$ | $7k^2+k$ |
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| $X$ | $-3$ | $-1$ | $0$ | $1$ | $3$ | $5$ | $7$ | $9$ |
|---|---|---|---|---|---|---|---|---|
| $F(X)$ | $0.1$ | $0.3$ | $0.5$ | $0.65$ | $0.75$ | $0.85$ | $0.90$ | $1$ |
| $X$ | $0$ | $1$ | $2$ | $3$ | $4$ |
| $P(X)$ | $0.1$ | $0.5$ | $0.2$ | $-0.1$ | $0.3$ |
| $x = x_{i}$ | $0$ | $1$ | $2$ |
| $P_{i}$ | $\frac{25}{36}$ | $\frac{5}{18}$ | $\frac{1}{36}$ |
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