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Własności prawdopodobieństwa - oblicz:
1. Wiadomo, że P(A) = 2/3, P(B) =1/2 i P(A u B) = 5/6. Oblicz P(A n B).
2. Wiadomo, że P(A`) = 0,5, P(B`) = 0,4 i P(A u B) = 0,7. Oblicz P(A n B).

Odp.; 1. P(A n B) =1/3, 2. P(A n B)=0,4

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