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# In a survey of retailers, what percent had purchased

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Manager
Joined: 02 Aug 2007
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17 Jan 2009, 21:00
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Difficulty:

45% (medium)

Question Stats:

61% (01:47) correct 39% (00:50) wrong based on 161 sessions

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In a survey of retailers, what percent had purchased computers for business purposes?

1) 85 percent of the retailers surveyed who owned their own store had purchased computers for business purposes.
2) 40 percent of the retailers surveyed owned their own store.

Official Guide 12 Question

 Question: 29 Page: 25 Difficulty: 600

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Video Explanations:

OPEN DISCUSSION OF THIS QUESTION IS HERE: in-a-survey-of-retailers-what-percent-had-purchased-134506.html
[Reveal] Spoiler: OA
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Re: DS - OG11 - Diagnostic no 29 [#permalink]

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18 Jan 2009, 04:37
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Hi Ali,

Have you considered the people who didn't own their own store but still had purchased computers for business purposes?
Manager
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Re: DS - OG11 - Diagnostic no 29 [#permalink]

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18 Jan 2009, 14:35
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Wow, talk about a dumb mistake!
Thanks.
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22 Oct 2013, 09:14
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Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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22 Oct 2013, 09:25
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Expert's post
In a survey of retailers, what percent had purchased computers for business purposes?

Say there are total of 100 retailers.

(1) 85 percent of the retailers surveyed who owned their own store had purchased computers for business purposes. Clearly insufficient, since we don't know how many retailers own their store and also how many retailers who do NOT own a store had purchased computers for business purposes. Not sufficient.

(2) 40 percent of the retailers surveyed owned their own store. Clearly insufficient.

(1)+(2) From (2) we can answer the first question, we had in (1) but not the second question: we still don't know how many retailers who do NOT own a store had purchased computers for business purposes. Not sufficient.

To elaborate more consider the diagram below:

As you can see we can not find the value of X from the info provided.

OPEN DISCUSSION OF THIS QUESTION IS HERE: in-a-survey-of-retailers-what-percent-had-purchased-134506.html
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Re: In a survey of retailers, what percent had purchased   [#permalink] 22 Oct 2013, 09:25
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