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Of the 230 single-family homes built in City X last year,

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Of the 230 single-family homes built in City X last year, [#permalink] New post 29 Jul 2009, 00:07
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Of the 230 single-family homes built in City X last year, how many were occupied at the end of the year?

(1)Of all single-family homes in City X, 90 percent were occupied at the end of last year
(2)A total of 7,200 single-family homes in City X were occupied at the end of last year
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Re: Data Sufficiency Quant Review 11G [#permalink] New post 29 Jul 2009, 00:13
lbsgmat wrote:
Of the 230 single-family homes built in City X last year, how many were occupied at the end of the year?

(1)Of all single-family homes in City X, 90 percent were occupied at the end of last year
(2)A total of 7,200 single-family homes in City X were occupied at the end of last year



IMO E, The question is looking for the no. of houses occupied which has been built last year.

1. It just mentions that 90 % has been occupied out of the total but we don't know how many were occupied which were last yr.
2. It just mentions the total no. of houses. so insuff.

we combine 1 and 2, we know that 720 houses are unoccupied but we don't know out of 720 houses how many have been built in last year. hence insuff.

OA pls .. !
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Re: Data Sufficiency Quant Review 11G [#permalink] New post 29 Jul 2009, 00:16
IMO E

Note: Question is just talking about 230 single-family homes built last year

(1)Of all single-family homes in City X, 90 percent were occupied at the end of last year -INSUFFICIENT
The option is talking about all the single-family homes in City X. We don't have any relationship between "all the single-family homes" and "single-family homes built last year only"

(2)A total of 7,200 single-family homes in City X were occupied at the end of last year
-INSUFFICIENT
The option is also talking about all the single-family homes in City X. We don't have any relationship between "all the single-family homes" and "single-family homes built last year only"

Together - INSUFFICIENT
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Re: Data Sufficiency Quant Review 11G   [#permalink] 29 Jul 2009, 00:16
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Of the 230 single-family homes built in City X last year,

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