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MGMAT GUIDE 3 - Formulas Strategy Problem - Page 63 (4th ed)

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shashank.3d
 Post subject: MGMAT GUIDE 3 - Formulas Strategy Problem - Page 63 (4th ed)
 Post Posted: Thu Sep 30, 2010 5:55 pm 
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Students


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The "competitive edge" of a baseball team is defined by the formula √(w/L) where w represents the number of teams wins, and L represents the number of teams losses.This year, the GMAT All Stars had 3 times as many wins and one - half as many losses as they had last year.By what factor did their competitive edge increase?

Can Somebody Please help me with this problem. If I assume different smart numbers I am getting different results.

Thanks in Advance.

MGAMT Guide 3 - Formulas Strategy - Page 63 - 4th edition.
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rajivbhatia2007
 Post subject: Re: MGMAT GUIDE 3 - Formulas Strategy Problem - Page 63 (4th ed)
 Post Posted: Thu Sep 30, 2010 7:35 pm 
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Students


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Picking numbers

Suppose initially there are 2 wins and 2 losses
competitive edge = sqrt (2/2) = sqrt (1) = 1

If the wins triple and the losses are halved, we get 6 wins and 1 loss.
competitive edge = sqrt (6/1) = sqrt (6)

Initial: 1 Now: sqrt of 6 so it should increase by a factor of sqrt of 6.

let me know if that is the answer.

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Rajiv Bhatia
www.gmathints.com
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tim
 Post subject: Re: MGMAT GUIDE 3 - Formulas Strategy Problem - Page 63 (4th ed)
 Post Posted: Thu Oct 07, 2010 11:49 pm 
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ManhattanGMAT Staff


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Shashank, please tell us what smart numbers you were using and what results you got. It's most likely you just made arithmetic errors..

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Tim Sanders
Manhattan GMAT Instructor
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