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WAEC Mathematics 2009 Question 48

Question 48

Sets

Which shaded region in the following diagrams represents (P ∪ Q) ∩ R?

Diagram for this question
  1. A.Diagram A
  2. B.Diagram B
  3. C.Diagram C
  4. D.Diagram D
Show the answer and explanation

Answer: C (Diagram C)

Explanation

First take P ∪ Q (everything in P or Q), then keep only the part that is also inside R. That is the top part of circle R overlapping P and Q, as in C.