WAEC Mathematics 2018 Paper

Concept:An implication $p \rightarrow q$ is false only when a true statement $p$ is followed by a false statement $q$.Explanation:The conditional statement $p \rightarrow q$ has its truth table checked for each case. If $p$ is true and $q$ is true, then $p \rightarrow q$ is true. If $p$ is true and $q$ is false, then $p \rightarrow q$ is false. If $p$ is false, the statement $p \rightarrow q$ is true regardless of whether $q$ is true or false. Hence, the only condition that makes the statement false is a true $p$ with a false $q$.Answer:B. If $p$ is true and $q$ is false.