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On which day of the week did the event take place? I. The event took place on the day immediately before Sunday.
II. The event took place on a weekend day.

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

Step-by-Step Solution

The day immediately before Sunday is Saturday, so statement I fixes the day. Statement II (a weekend day) allows both Saturday and Sunday.
Answer: A) Statement I alone is sufficient but Statement II alone is not

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