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How is X related to Y? Statement I: X is the son of Z. Statement II: Z is the father of Y.

Competition practiceData Sufficiency
  • AEither statement alone is sufficient
  • BStatement II alone is sufficient but Statement I alone is not
  • CStatement I alone is sufficient but Statement II alone is not
  • DBoth statements together are needed (neither alone is sufficient)

Step-by-Step Solution

Together, X and Y share the father Z and X is male, so X is the brother of Y; neither statement alone links X to Y.
Answer: D) Both statements together are needed (neither alone is sufficient)

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