Data Sufficiency — Relationships: How is X related to Y? Statement I: Y says, "I have only one brother." Statement II: X says, "I have only one sister." Decide which statements are sufficient to answer the question. Choose the correct sufficiency option.
Verbal Reasoning
Data Sufficiency
Difficulty: Easy
Choose an option
Answer
Correct Answer: Even both statements I and II together are not sufficient.
Explanation
ReasoningThe statements restrict the composition of each person's siblings but do not link X and Y explicitly as siblings, cousins, or spouses.Multiple family structures satisfy both statements with different relations between X and Y (e.g., siblings in some cases, not siblings in others).
ConclusionRelationship cannot be uniquely determined.
Final AnswerEven both statements I and II together are not sufficient.