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The average (arithmetic mean) of a list of numbers is what

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Intern
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Joined: 25 Dec 2008
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The average (arithmetic mean) of a list of numbers is what [#permalink]

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New post 28 Dec 2008, 00:38
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

The average (arithmetic mean) of a list of numbers is what percent of the sum of the numbers?
A. there are 8 numbers in the list.
B. The sum of the numbers in the list is 100.

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Manager
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Re: lsit [#permalink]

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New post 28 Dec 2008, 11:46
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stat 1
-------

list consist of 8 numbers.
Percent of Mean is 100/8 %

stat 2
------

100 is the sum of numbers in the list .
Not sufficient , depends on how many numbers in the list.

So for me Ans is (A)

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Re: lsit [#permalink]

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New post 28 Dec 2008, 12:59
(Sum/n) = (X/100) (Sum)

equal to

1/n = X/100 means X =100/n

(1) n=8

Sufficient

(2) Sum=100. Insufficient.

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Re: lsit   [#permalink] 28 Dec 2008, 12:59
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The average (arithmetic mean) of a list of numbers is what

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