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Theory of Statistics - George Mason University

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0.1 Measure, Integration, and Functional Analysis 701<br />

are three sets, we take out all pairwise intersections and then add back in the<br />

triple intersection. We can easily extend this (the pro<strong>of</strong> is by induction) so<br />

that, in general for n ≥ 4, we have<br />

ν(∪n i Ai) = <br />

1≤i≤n ν(Ai) − <br />

1≤i

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