oblicz p(b\a) jeśli p(a)=2/3 i p(A u B)= 8/9
P(A)=2/3
P(AuB)=8/9
P(B\A)= P(AUB)-P(A)= 8/9-2/3=8/9-6/9=2/9
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P(A)=2/3
P(AuB)=8/9
P(B\A)= P(AUB)-P(A)= 8/9-2/3=8/9-6/9=2/9