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UI Post-UTME Mathematics 2013 Question 11

Question 11

Sets

Out of 12 Physics teacher in a school, 7 also teach Mathematics while 6 also teach Integrated Science. If 3 teachers teach all three subjects, use the information to answer the next three questions.
How many teach Physics and Mathematics only?

  1. A.None
  2. B.2
  3. C.4
  4. D.6
Show the answer and explanation

Answer: C (4)

Explanation

7 physics teachers also teach Mathematics, and 3 of them teach all three, so 7 − 3 = 4 teach Physics and Mathematics only.