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by rkhicha » Thu Jul 15, 2010 5:38 am
Are at least 10% of the people in Country X who are 65yrs old or older employed?

1. In Country X, 11.3% of the population is 65 yrs old or older
2. In Country X, of the of the population is 65 yrs old or older, 20% of the men and 10% of the women are employed.

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Source: — Data Sufficiency |

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by Rahul@gurome » Thu Jul 15, 2010 5:51 am
(1) There is no information of the people employed. So, (1) is NOT SUFFICIENT.

(2) 20% of the men + 10% of women are employed. Although the number of men and women are not known, but the employment should be greater than 10%. So, (2) is SUFFICIENT.

[spoiler]The correct answer is (B).[/spoiler]
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by Patrick_GMATFix » Thu Jul 15, 2010 6:14 am
Hi rkhicha,

This is a weighted average GMATPrep question. We want to know whether at least 10% of older ppl are employed. Statement 1 gives us no employment data. Statement 2 tells us that 10% of older women and 20% of older men are employed. The % of the entire older population that is employed will be a weighted avg of the older men and the older women. Thus the % of the entire older population that is employed will be somewhere between 10% and 20%. It is guaranteed that at least 10% of this population is employed. Statement 2 is sufficient and B is the correct answer.

A more detailed explanation and video solution are available at GMATPrep Question 1265. To practice similar questions, set topic='Weighted Averages and Sets & Groups' and difficulty='600-700 & 700+' in the Drill Generator.

Hope that helps,
-Patrick
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