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WAEC Mathematics 2007 Question 39

Question 39

Sets

The Venn diagram shows the choice of food of a number of visitors to a canteen. How many people took at least two kinds of food?

Diagram for this question
  1. A.10
  2. B.12
  3. C.15
  4. D.17
Show the answer and explanation

Answer: D (17)

Explanation

Add the overlap regions: 6 + 4 + 2 + x = 12 + 5 = 17 (x = 5 from the total of 35).