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UI Post-UTME Mathematics 2013 Question 10

Question 10

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 only?

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

Answer: B (2)

Explanation

Physics & Maths only = 7 − 3 = 4, Physics & Integrated Science only = 6 − 3 = 3, all three = 3; Physics only = 12 − 10 = 2.