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Double Matrix Explanation in Word translations

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Buix0065
 Post subject: Double Matrix Explanation in Word translations
 Post Posted: Wed Jul 13, 2011 7:56 am 
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Students


Posts: 2
Hello,

In Word Translations 4th ed. on page 122 the book says a double matrix should have rows of Prob 2 right, prob 2 wrong and columns of prob 1 right, prob 2 wrong.

The example before that was columns of A, not A, and rows of B not B.

Then on the next page, the example is in the form:

columns Men, Women rows Employed, not employed

Am i missing something? Based on what the book was teaching, shouldn't it be:

Men Employed, Men Not Employed vs. Women E, Women NE?

Thanks!
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varun_783
 Post subject: Re: Double Matrix Explanation in Word translations
 Post Posted: Wed Jul 13, 2011 1:17 pm 
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Course Students


Posts: 263
Hi,

The idea is to have mutually exclusive options for each decision. You are being a bit too mechanical in your logic.

If we make a column as per your logic, what will you put in the box that corresponds to Men Employed - Women Employed? This will be 0 as a man cannot be a woman.

Whenever in doubt, try drawing the matrix and you will realize that it wont work if its not drawn correctly

Regards

Sunil
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jnelson0612
 Post subject: Re: Double Matrix Explanation in Word translations
 Post Posted: Sun Jul 17, 2011 7:10 pm 
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ManhattanGMAT Staff


Posts: 1857
Thanks Sunil. Buix, if you have further questions please repost your question in the appropriate forum: manhattan-gmat-math-strategy-guides-f7.html

_________________
Jamie Nelson
ManhattanGMAT Instructor
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