Question
Question: If A, B, C be three sets such that A ∪ B = A ∪ C and A ∩ B = A ∩ C, then...
If A, B, C be three sets such that A ∪ B = A ∪ C and A ∩ B = A ∩ C, then
A
A = B
B
B = C
C
A = C
D
A = B = C
Answer
B = C
Explanation
Solution
It is obvious.