Question: 8. Let A, B, and C be three events. Show that P (A B C) = P (A) + P (B) + P

8. Let A, B, and C be three events. Show that P (A ∪ B ∪ C) = P (A) + P (B) + P (C) if and only if P (AB) = P (AC) = P (BC) = 0.

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