一条数学的prep

我系大P · 发表于 2011-7-18 01:52:23

What is the average (arithmetic mean) height of the n people in a certain group?

1. .....

2. The sum of the heights of the n people is 178 feet 9 inches.

The answer is A. Im wondering why 2 is not the correct???

sdcar2010 · 发表于 2011-7-18 02:15:45

If you do not know the value of n, you still do not know the mean.

我系大P · 发表于 2011-7-18 02:17:18

ooo.... u r right..

thx!!

一条数学的prep

所属分类: GMAT考试

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