Let P̅ and Q̅ denote the complements of two sets P and Q. Then the s

1.	Let P̅ and Q̅ denote the complements of two sets P and Q. Then the set (P - Q) ∪ (Q - P) ∪ (P ∩ Q) is
A.	P ∪ Q
B.	P̅ ∪ Q̅
C.	P ∩ Q
D.	P̅ ∩ Q̅
Answer» B. P̅ ∪ Q̅

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Let P̅ and Q̅ denote the complements of two sets P and Q. Then the set (P - Q) ∪ (Q - P) ∪ (P ∩ Q) is

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