| $X = x$ | $-1$ | $0$ | $1$ | $2$ |
|---|---|---|---|---|
| $F(X = x)$ | $0.3$ | $0.7$ | $0.8$ | $1$ |
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| $X$ | $2$ | $3$ | $4$ |
|---|---|---|---|
| $P(X=x)$ | $0.2$ | $0.5$ | $0.3$ |
| $x_i$ | $-2$ | $-1$ | $0$ | $1$ | $2$ |
| $P(X = x_i)$ | $0.2$ | $0.5$ | $0.15$ | $0.25$ | $0.1$ |
| $x$ | $0$ | $1$ | $2$ | $3$ |
| $P(x)$ | $0.2$ | $k$ | $k$ | $2k$ |
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