The probability distribution of a discrete random variable $X$ is given by the following table:
$X$ $1$ $2$ $3$ $4$ $5$ $6$ $P(X)$ $K$ $2K$ $3K$ $4K$ $5K$ $6K$
Find the value of $P(2 < X < 6)$.
| $X$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ |
|---|---|---|---|---|---|---|
| $P(X)$ | $K$ | $2K$ | $3K$ | $4K$ | $5K$ | $6K$ |
Find the value of $P(2 < X < 6)$.
- A$\frac{4}{21}$
- B$\frac{1}{21}$
- C$\frac{10}{21}$
- D$\frac{4}{7}$
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Difficult
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The probability distribution of a random variable $X$ is as follows. Then the mean of $X$ is $X = x_{i}$ $-2$ $-1$ $0$ $1$ $2$ $P(X = x_{i})$ $k^2 / 3$ $k^2$ $2k^2 / 3$ $k / 2$ $k / 2$
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