The value of $C$ for which $P(X = k) = Ck^2$ can serve as the probability function of a random variable $X$ that takes values $0, 1, 2, 3, 4$ is
- A$\frac{1}{30}$
- B$\frac{1}{10}$
- C$\frac{1}{3}$
- D$\frac{1}{15}$
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$X = x$ $-2$ $-1$ $0$ $1$ $2$ $3$ $P(X = x)$ $\frac{1}{10}$ $K + \frac{2}{10}$ $K + \frac{3}{10}$ $K + \frac{3}{10}$ $K + \frac{4}{10}$ $K + \frac{2}{10}$
| $X = x$ | $-2$ | $-1$ | $0$ | $1$ | $2$ | $3$ |
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| $P(X = x)$ | $\frac{1}{10}$ | $K + \frac{2}{10}$ | $K + \frac{3}{10}$ | $K + \frac{3}{10}$ | $K + \frac{4}{10}$ | $K + \frac{2}{10}$ |
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