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  3. The average (arithmetic mean) of 50 measurements is 34.6, and the least and the greatest of the measurements are 18.3 and 50.9,

The average (arithmetic mean) of 50 measurements is 34.6, and the least and the greatest of the measurements are 18.3 and 50.9,

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问题 The average (arithmetic mean) of 50 measurements is 34.6, and the least and the greatest of the measurements are 18.3 and 50.9, respectively.

Column A                                   Column B
The median of the 50 measurements          34.6
选项 A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案D
解析 50次测量的算术平均值是34.6，测量的最大值和最小值分别为18.3和50.9。
解：本题的正确答案是(D)。考生在解答本题时，只要注意到mean和median之间没有任何确定的关系，就可推知本题为无法判断。
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