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Seven students sit in a single row. Who sits exactly in the middle? Statement I: There are three students between P and Q. Statement II: R sits exactly in the middle with three students on each side.

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

Step-by-Step Solution

II places R in the centre (position 4 of 7) directly. I only constrains the gap between P and Q and never names the middle seat.
Answer: C) Statement II alone is sufficient but Statement I alone is not

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