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GMATPrep - Avg Height

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Source: — Data Sufficiency |
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by kshankker » Tue Aug 26, 2008 8:11 pm
Ans is A......

statement (1) gives u the Avg of n/3 tall people = 6 feet 5/2 inches. then it gives the rest (2n/3) people = 5 feet 10 inches.. so the total Avg is sum of n/3 + 2n/3 .....hence it is sufficient.

statement (2) gives u only sum of heights , not about n....---insufficient.

Got it....
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by California4jx » Wed Aug 27, 2008 5:13 am
kshankker wrote:Ans is A......

statement (1) gives u the Avg of n/3 tall people = 6 feet 5/2 inches. then it gives the rest (2n/3) people = 5 feet 10 inches.. so the total Avg is sum of n/3 + 2n/3 .....hence it is sufficient.

statement (2) gives u only sum of heights , not about n....---insufficient.

Got it....
ah .. thanks ..
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