Sets-Relations-And-Functions Question 144
If $ (A-B)\cup (B-A)=\emptyset $ for subsets A and B of the universal set U, then which one of the following is correct?
Options:
A) B is proper non-empty subset of A
B) A and B are non-empty disjoint sets
C) $ B=\phi $
D) None of the above
Correct Answer: C $ \Rightarrow B=\phi $
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Answer:
Solution:
BETA
