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WAEC Mathematics 2005 Question 34

Question 34

Sets

P = {3, 9, 11, 13} and Q = {3, 7, 9, 15} are subsets of the universal set ε = {1, 3, 7, 9, 11, 13, 15}. Find P'∩Q'.

  1. A.{3, 9}
  2. B.{5, 7, 15}
  3. C.{1}
  4. D.{1, 11}
Show the answer and explanation

Answer: C ({1})

Explanation

P' = {1, 7, 15} and Q' = {1, 11, 13}; only 1 is in both.