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In a survey of retailers, what percent had purchased

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In a survey of retailers, what percent had purchased [#permalink] New post 17 Jan 2009, 20:00
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Question Stats:

60% (01:46) correct 40% (00:44) wrong based on 97 sessions
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

GMAT Official Guide 12

Question: 29
Page: 25
Difficulty: 600

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OPEN DISCUSSION OF THIS QUESTION IS HERE: in-a-survey-of-retailers-what-percent-had-purchased-134506.html
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Re: DS - OG11 - Diagnostic no 29 [#permalink] New post 18 Jan 2009, 03:37
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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? :wink:
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Re: DS - OG11 - Diagnostic no 29 [#permalink] New post 18 Jan 2009, 13:35
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Wow, talk about a dumb mistake!
Thanks.
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Re: In a survey of retailers, what percent had purchased [#permalink] New post 22 Oct 2013, 08:14
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Re: In a survey of retailers, what percent had purchased [#permalink] New post 22 Oct 2013, 08:25
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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:
Image

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

Answer: E.

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, 08:25
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