1.

Prove that:(1)P(A∪B)=P(A)+P(B)-P(A∩B)(2)P(A∪B∪C)=P(A)+P(B)+P(C)-P(A∩B)-P(B∩C)-P(C∩A)+P(A∩B∩C)

Answer» Prove that:
(1)P(A∪B)=P(A)+P(B)-P(A∩B)
(2)P(A∪B∪C)=P(A)+P(B)+P(C)-P(A∩B)-P(B∩C)-P(C∩A)+P(A∩B∩C)


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