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WAEC Mathematics 2011 Question 44

Question 44

Sets

The Venn diagram shows the number of students in a class who like reading (R), dancing (D) and swimming (S). How many students like dancing and swimming?

Diagram for this question
  1. A.7
  2. B.9
  3. C.11
  4. D.13
Show the answer and explanation

Answer: A (7)

Explanation

S has 16 students: 6 + 3 + 2 + (S and D only) = 16, so S and D only = 5 (the 5 in the diagram). Dancing and swimming = 2 + 5 = 7.