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How many people are standing in a row? Statement I: A is 10th from the left and 6th from the right. Statement II: B is 7th from the left and 9th 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)
  • BEither statement alone is sufficient
  • CStatement I alone is sufficient but Statement II alone is not
  • DStatement II alone is sufficient but Statement I alone is not

Step-by-Step Solution

I gives 10 + 6 − 1 = 15 and II gives 7 + 9 − 1 = 15, so either statement alone yields the total.
Answer: B) Either statement alone is sufficient

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