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WAEC Mathematics 2023 Question 2

Question 2

Sets

There are 30 students in a class. 15 study woodwork and 13 study metalwork, 6 study neither of the two subjects. How many students study woodwork but not metalwork?

  1. A.5
  2. B.9
  3. C.11
  4. D.13
Show the answer and explanation

Answer: C (11)

Explanation

30 − 6 = 24 study at least one subject, so 15 + 13 − 24 = 4 study both. Woodwork only = 15 − 4 = 11.