答案選E 第一個是2最后一個是20第四個是6,因為3出現(xiàn)最多所以第二三個都是3.
假設(shè)平均值為7 七個數(shù)和為49則第六個為7第八個為8即可
假設(shè)平均值為10 17、19即可
既然7可以10可以那么8.5也可以
所以選E
SAT數(shù)學(xué)真題
SAT數(shù)學(xué)真題
The least and greatest numbers in a list of 7
real numbers are 2 and 20,respectively.The median of the list is 6,and the
number 3 occurs most often in the list.Which of the following could be the
average (arithmetic mean) of the numbers in the list?
I.7 II.8.5 III.10
A.I only B.I and II only C.I and III only D.II and III only E.I,II and III
The least and greatest numbers in a list of 7
real numbers are 2 and 20,respectively.The median of the list is 6,and the
number 3 occurs most often in the list.Which of the following could be the
average (arithmetic mean) of the numbers in the list?
I.7 II.8.5 III.10
A.I only B.I and II only C.I and III only D.II and III only E.I,II and III
英語人氣：390 ℃時間：2020-05-12 04:41:24
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