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
- A.~q ⇔ p
- B.q ⇒ p
- C.p ⇒ q
- 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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