Data Sufficiency — Relationships: How is Tanya related to the man in the photograph? Statement I: The man in the photograph is the only son of Tanya's grandfather. Statement II: The man has no brothers or sisters, and his father is Tanya's grandfather. Decide which statements are sufficient to answer the question. Choose the correct sufficiency option.
Verbal Reasoning
Data Sufficiency
Difficulty: Medium
Choose an option
Answer
Correct Answer: Statement II alone is sufficient, but Statement I alone is not sufficient.
Explanation
Interpretation
- Statement I: The man is the only son of Tanya's grandfather, but the grandfather may also have daughters (e.g., Tanya's mother). Tanya could thus be the man's niece or daughter ⇒ ambiguous.
- Statement II: The man has no siblings, and his father is Tanya's grandfather ⇒ the grandfather has exactly one child (this man). Therefore Tanya, being a grandchild of that grandfather, must be the man's daughter.
Final AnswerStatement II alone is sufficient, but Statement I alone is not sufficient.