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M25 Q10 Set T consists of a certain number of even integers

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Re: M25 Q10 Set T consists of a certain number of even integers [#permalink] New post 07 Mar 2014, 05:49
jenyang5268 wrote:
Set T consists of a certain number of even integers divisible by 3. Is standard deviation of T positive?

1. All elements of set T are positive
2. The range of set T is 0

[Reveal] Spoiler: OA
B

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Can anyone explain this? Thanks!


I got this ans correct !

I was just thinking..even integers divisble by 3? y is it given? i think its just an extra information to confuse students?
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Re: M25 Q10 Set T consists of a certain number of even integers [#permalink] New post 07 Mar 2014, 08:03
Expert's post
sanjoo wrote:
jenyang5268 wrote:
Set T consists of a certain number of even integers divisible by 3. Is standard deviation of T positive?

1. All elements of set T are positive
2. The range of set T is 0

[Reveal] Spoiler: OA
B

Source: GMAT Club Tests - hardest GMAT questions

Can anyone explain this? Thanks!


I got this ans correct !

I was just thinking..even integers divisble by 3? y is it given? i think its just an extra information to confuse students?


This is one way of saying that the set consists of multiples of 6. You are right, this piece of info is not very useful.
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Re: M25 Q10 Set T consists of a certain number of even integers   [#permalink] 07 Mar 2014, 08:03
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