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Question: Is M the sister of N? Statement I: M is the daughter of P and N is the son of P. Statement II: N is the brother of M. Which statement(s) are sufficient to answer?

Competition practiceData Sufficiency
  • AStatement I alone is sufficient but Statement II alone is not
  • BBoth statements together are needed (neither alone is sufficient)
  • CEither statement alone is sufficient
  • DStatement II alone is sufficient but Statement I alone is not

Step-by-Step Solution

Statement I says M is a daughter (female) and a sibling of N, so M is the sister of N. Statement II fixes N's gender but not M's, so it alone cannot confirm M is a sister.
Answer: A) Statement I alone is sufficient but Statement II alone is not

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