if the average (arithmetic mean) of x,y,z,5,and 7 is 8,which of the following must be true?其中 the range of the five numbers is 2 or more 这个选项是正确的 为什么?

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if the average (arithmetic mean) of x,y,z,5,and 7 is 8,which of the following must be true?
其中 the range of the five numbers is 2 or more 这个选项是正确的 为什么?

这个选项肯定是对的,因为5 和 7 的差距是2,所以the range of the five numbers,has to be >2
Range is the difference between the largest and smallest values