GWX11-14

kanba

GWD11-14: The number of defects in the first five cars to come through a new production line are 9,7,10,4,and 6, respectively. If the sixth car through the production line has either 3,7,12 defects, for which of these values does the mean number of defects per car for the first six cars equal the median?

答案是3和12

我只选了3，问题不是问能使这6个数的均值等于他们中间数的那个数吗？12不行啊？