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Magoosh - 数学PS - 312
Positive integers a, b, c, d and e are such that a < b < c < d < e. If the average (arithmetic mean) of the five numbers is 6 and d - b = 3, then what is the greatest possible range of the five numbers?
  • A12
  • B17
  • C18
  • D19
  • E20
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正确答案: C

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