问题
问答题
五个数，x，y，z，5和7，他们的算术平均值(mean)等于8，问下面哪一个正确
(Ⅰ)The range of the five numbers is 2 or more.
(Ⅱ)At least one of x，y，z is more than 9.
答案
参考答案：Ⅰ and Ⅱ
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五个数，x，y，z，5和7，他们的算术平均值(mean)等于8，问下面哪一个正确
(Ⅰ)The range of the five numbers is 2 or more.
(Ⅱ)At least one of x，y，z is more than 9.
参考答案：Ⅰ and Ⅱ