AMC 8 1990 Problem 19

AMC8 1990 年第 19

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There are 120 seats in a row. What is the fewest number of seats that must be occupied so the next person to be seated must sit next to someone?
一排有 120 个座位。最少需要坐满多少个座位,才能使下一个入座的人必须挨着某人坐?
  1. A.30
  2. B.40
  3. C.41
  4. D.60
  5. E.119

正确答案 · Correct Answer

B

解析 · Solution

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