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Unilorin Post-UTME Mathematics 2022 (Model questions) Question 10

Question 10

Sets

Given: M = {1, 2, 3, 4, 5}, N = {1, 2, 4, 5, 3}, Z = {2, 1, 4, 5}. Which of the following is accurate?

  1. A.N ⊆ M
  2. B.N ⊂ M
  3. C.Z ⊆ M
  4. D.N ⊂ Z
Show the answer and explanation

Answer: A (N ⊆ M)

Explanation

N has exactly the same elements as M, so N ⊆ M (but not a proper subset). N cannot be inside Z because 3 is not in Z.