Let \( \mathrm{X} \) be a random variable taking values \( x_{1}, x...

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Let \( \mathrm{X} \) be a random variable taking values \( x_{1}, x_{2}, \ldots, x_{n} \) with probabilities \( p_{1}, p_{2}, \ldots, p_{n} \), respectively. Then \( \operatorname{var}(\mathrm{X})= \)
\( \mathrm{P} \)
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