another sample midterm - Oncourse
another sample midterm - Oncourse
another sample midterm - Oncourse
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(E) .07<br />
(F) none of the above<br />
25. In this problem, A,B,C are subsets<br />
of a universal set U. One<br />
of the following is always true.<br />
Which one?<br />
(A) (A ∩ B ∩ C ′ ) ∪ (A ′ ∩ B ′ ∩ C) ⊂<br />
A‘ ∩ B ′ ∩ C ′<br />
(B) A ′ ∩ B ′ ∩ C ′ = ∅<br />
(C) A ⊂ B ∪ A ′<br />
(D) A ∩ B ⊂ B ∪ C ′<br />
(E) (A ∪ B) ′ = A ′ ∪ B ′<br />
(F) none of the above
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