| $x_i$ | $-2$ | $-1$ | $0$ | $1$ | $2$ |
| $P(X = x_i)$ | $0.2$ | $0.5$ | $0.15$ | $0.25$ | $0.1$ |
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| $X$ | $0$ | $1$ | $2$ | $3$ | $4$ |
| $P(X)$ | $0.1$ | $0.5$ | $0.2$ | $-0.1$ | $0.3$ |
| $X$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $P(X=x)$ | $K$ | $2K$ | $3K$ | $2K$ | $K$ |
| $X = x_i$ | $-1$ | $0$ | $1$ | $2$ |
|---|---|---|---|---|
| $P(X = x_i)$ | $k^3$ | $2k^3 + k$ | $4k - 10k^2$ | $4k - 1$ |
| $X = x$ | $-2$ | $-1$ | $0$ | $1$ | $2$ | $3$ |
| $P(X = x)$ | $\frac{1}{10}$ | $k$ | $\frac{1}{5}$ | $2k$ | $\frac{3}{10}$ | $k$ |
| $X = x$ | $1$ | $2$ | $3$ | $\dots$ | $n$ |
|---|---|---|---|---|---|
| $P(X = x)$ | $\frac{1}{n}$ | $\frac{1}{n}$ | $\frac{1}{n}$ | $\dots$ | $\frac{1}{n}$ |
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