Maths-
General
Easy

Question

For any two sets A and B, if A intersection X equals B intersection X equals ϕ and A union X equals B union X for some set X, then

  1. A minus B equals A intersection B  
  2. A equals B  
  3. B minus A equals A intersection B  
  4. None of these  

The correct answer is: A equals B


    Given, A intersection X equals B intersection X equals ϕ
    rightwards double arrow A and X comma blank B and X are disjoint sets.
    Also, A union X equals B union X rightwards double arrow A equals B

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