WAEC 2023 Mathematics · Question 29

Consider the statements: p: Siah is from Foya. q: Foya is in Lofa. Write in symbolic for the statement: "If Siah is from Foya, then Foya is in Lofa"

Options

  1. A.~q ⇔ p
  2. B.q ⇒ p
  3. C.p ⇒ q
  4. D.p ⇔ q

Answer: C. p ⇒ q

Explanation written with AI and checked against the answer key

Step 1: Analyze the question We are given two simple statements:

  • p: Siah is from Foya
  • q: Foya is in Lofa

We must write "If Siah is from Foya, then Foya is in Lofa" in symbols.

Step 2: Concept A conditional statement has the form "If A, then B" and is written A ⇒ B.

  • The part after "if" is the hypothesis (the antecedent).
  • The part after "then" is the conclusion (the consequent).

Step 3: Solution

  • The "if" part is "Siah is from Foya", which is p.
  • The "then" part is "Foya is in Lofa", which is q.

So the statement is p ⇒ q.

Checking the other options:

  • A. ~q ⇔ p means "p if and only if not q", which is not what was said.
  • B. q ⇒ p means "If Foya is in Lofa, then Siah is from Foya". The direction is reversed (the converse).
  • D. p ⇔ q means "p if and only if q", a biconditional, which is stronger than the original statement.

Answer: C. p ⇒ q

Exam tip: Always match "if" with the first symbol and "then" with the second. "If p, then q" always means p ⇒ q. Watch out for questions that reverse the order, such as "p only if q" (still p ⇒ q) or "p if q" (this is q ⇒ p).

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