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Question: How many persons are sitting in a row, all facing the same way? Statement I: A is 5th from the left and 9th from the right. Statement II: B is 4th from the left and 10th from the right. Which statement(s) is/are sufficient to answer the question?

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

Step-by-Step Solution

A single person's two-sided rank gives the total: I gives 5 + 9 - 1 = 13 and II gives 4 + 10 - 1 = 13. Each alone suffices.
Answer: D) Either statement alone is sufficient

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