AMC 8 1988 Problem 21

AMC8 1988 年第 21

统计与数据图表★★★★
Problem A fifth number, nn, is added to the set {3,6,9,10}\{ 3,6,9,10 \} to make the mean of the set of five numbers equal to its median. The number of possible values of nn is
将第五个数 nn 加入集合 {3,6,9,10}\{3,6,9,10\} 中,使得这五个数的平均数等于其中位数。nn 的可能值有多少个?
  1. A.1
  2. B.2
  3. C.3
  4. D.4
  5. E.more than 4\text{more than }4

正确答案 · Correct Answer

C

解析 · Solution

解析整理中

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