英语翻译the least and greatest numbers in a list of 7 real numbe

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英语翻译
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?

在这个实数数列中,最小值和最大值分别是2和20.数列的中位数是6,数列中3出现的次数最多.下面的几个数中哪一个又可能是这个数列的平均数?
根据条件,这个数列应该是2,3,3,6,a,b,20.a和b要大于6小于20,a+b就要大于12小于40,于是得出2+3+3+6+a+b+20要大于46小于74.题目要求平均数,所以除以七.假设平均数是x那么可以得出x要大于46除以7小于74除以7.而且平均数又要是实数,所以又可能是7或8.5或10

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