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英语翻译The numbers of cars sold at a certain dealership on six

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英语翻译
The numbers of cars sold at a certain dealership on six of the last seven business days were 4,7,2,8,3,and6,respectively.If the number of cars sold on the seventh business day was either 2,4,or 5,for which of the three values does the average number of cars sold per business day for the seven business days equal the median number of cars sold per day for the seven days?
the last seven business days到底是一周前6天还是后六天啊
英语翻译The numbers of cars sold at a certain dealership on six
某车行最近七天内前六天的售车数量分别为:4,7,2,8,3和6 .如果第七天的售车数量是2,4或5中任意一个,那么那个数能够使得七天平均售车数等于七天内每天售车数的中间值?


如果第七天售车数是2,则平均值为32/7,中间值为4(2,2,3,4,6,7,8,中间值是4)
如果第七天售车数是4,则平均值为34/7,中间值为4(2,3,4,4,6,7,8)
如果第七天售车数是5,则平均值为5,中间值为5(2,3,4,5,6,7,8)
所以答案是5.