Question

A union A' =
phi
U
A
A'​

Answer 1

Answer:

Since the union of two sets is the set of all elements in both sets and the null set has no elements, all of the elements in both sets are only the elements in A.

The union of two or more sets is the set that contains all the elements of the two or more sets. ... The general probability addition rule for the union of two events states that P(A∪B)=P(A)+P(B)−P(A∩B) P ( A ∪ B ) = P ( A ) + P ( B ) − P ( A ∩ B ) , where A∩B A ∩ B is the intersection of the two sets.

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