Double Matrix Explanation in Word translations

[Buix0065]

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!

[messi10]

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

[jnelson0612]

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