GRE Problem Solving Question 605

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Source: Magoosh

Sid intended to type a seven-digit number, but the two 3's he meant to type did not appear. What appeared instead was the five-digit number 52115. How many different seven-digit numbers could Sid have meant to type?

  • A 10
  • B 16
  • C 21
  • D 24
  • E 27

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