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JAMB Mathematics 1997 Question 10

Question 10

Sets

A survey of 100 students in an institution shows that 80 students speak Hausa and 20 students speak Igbo, while only 9 students speak both languages. How many students speak neither Hausa nor Igbo?

  1. A.0
  2. B.9
  3. C.11
  4. D.20
Show the answer and explanation

Answer: B (9)

Explanation

Students speaking at least one language = 80 + 20 − 9 = 91. So 100 − 91 = 9 speak neither.