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随机变量的期望值
The expected value of \(X\) is \(\displaystyle\operatorname{E}[X]=\int_{\Omega}X(\omega)P(d\omega)=\int_\mathbb{R}x\mu(dx)\)
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statusnot read reprioritisations
last reprioritisation on suggested re-reading day
started reading on finished reading on

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