CAT 2018 Slot 2 QA Q31 Set Theory

Question 31 of the Quantitative Ability (QA) section, CAT 2018 Slot 2, with CAT's official answer.

For two sets A and B, let AΔB denote the set of elements which belong to A or B but not both. If P = {1,2,3,4}, Q = {2,3,5,6,}, R = {1,3,7,8,9}, S = {2,4,9,10}, then the number of elements in (PΔQ)Δ(RΔS) is
  1. A
    7
  2. B
    8
  3. C
    9
  4. D
    6

Answer: (A) 7 Set Theory MCQ

A worked solution for this question is being written. Meanwhile, practise it in a timed mock and see how other aspirants did.

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