Data Sufficiency

试题详情

题目:

The average (arithmetic mean) of a list of numbers is what percent of the sum of the numbers?
(1) There are 8 numbers in the list.
(2) The sum of the numbers in the list is 100.

选项:

答案:

A

提问:

还是听不懂录音。那我为什么不知道avg就可以选a呢
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提问:

为什麽答案是A?
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