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WAEC Mathematics 2018 Question 39

Question 39

Logic

If p and q are two statements, under what condition would p ⇒ q be false?

  1. A.If p is true and q is true
  2. B.If p is true and q is false
  3. C.If p is false and q is false
  4. D.If p is false and q is true
Show the answer and explanation

Answer: B (If p is true and q is false)

Explanation

An implication 'if p then q' is false only when p is true and q is false.