Wiedząc, że P(A)=2/5, P(B)=7/10 i P(A u B)=9/10 oblicz P(A-B).
po pierwsze P(A\B).
P(A)=2/5, P(B)=7/10 i P(A u B)=9/10 oblicz P(A-B).
P(AUB)=P(A)+P(B)-P(A∧B)
9/10=4/10+7/10-P(A∧B)
P(A∧B)=2/10
P(A\B)=P(A)-P(A∧B)=4/10-2/10=2/10=1/5
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po pierwsze P(A\B).
P(A)=2/5, P(B)=7/10 i P(A u B)=9/10 oblicz P(A-B).
P(AUB)=P(A)+P(B)-P(A∧B)
9/10=4/10+7/10-P(A∧B)
P(A∧B)=2/10
P(A\B)=P(A)-P(A∧B)=4/10-2/10=2/10=1/5