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[Problem Solving]

试题详情

题目:

A certain list consists of 21 different numbers.  If n is in the list and n is 4 times the average (arithmetic mean) of the other 20 numbers in the list, then n is what fraction of the sum of the 21 numbers in the list?

选项:

A、
B、
C、
D、
E、

答案:

B

提问:

math mean的问题 不是很清楚

解答:

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阅读1004
解答: sysadmin

提问:

math mean的问题 不是很清楚

解答:

点赞0
阅读1005
解答: sysadmin老师

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