Consider the rule: 'Only students with a grade of A may join the science club.' Which statement must be true?
Answer and explanation
Correct answer: A. Every club member has a grade of A
- Step 1: "Only students with an A may join" means that having an A is necessary for membership. Step 2. So anyone in the club must have an A. Answer: Every club member has a grade of A. Why not the others: The rule does not say that an A is enough to join, so students with an A are not forced to join, and some may stay outside; a club member with a B would break the rule.
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