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If it is known that p(a)=0, 7, p(b)=0, 6 and p(a^b)=0, 3 solve p(AvB) and p(a'^b

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Spockviz
P(AuB)=P(A)+P(B)-P(AnB)
P(AuB)=0,7+0,6-0,3=1
P(A')=1-P(A)
P(A')=1-0,7=0,3
P(A'nB)=P(B\A)=P(B)-P(AnB)
P(A'nB)=0,6-0,3=0,3