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by aa2kash » Mon Oct 26, 2009 6:50 am
50% of the aparments in a certain building have windows and hardwood floors. 25% of the apartments without windows have hardwood floors. If 40% of the apartments do not have hardwood floors, what percent of the apartments with windows have hardwood floors?

A. 10
B. 16 2/3
C. 40
D. 50
E. 83 1/3

Please suggest me a quick way to tackle such problems.
OA is E
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by caspermonday » Mon Oct 26, 2009 10:48 am
Hey, the best way, in my opinion was suggested by MGMAT (they propose to fill out a simple matrix, you should see it in their Word transalations). Refer there. You will save loads of time at your exam.
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by mehravikas » Mon Oct 26, 2009 7:06 pm
Can you draw a table please?
caspermonday wrote:Hey, the best way, in my opinion was suggested by MGMAT (they propose to fill out a simple matrix, you should see it in their Word transalations). Refer there. You will save loads of time at your exam.
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by ayushr » Mon Oct 26, 2009 8:37 pm
mehravikas - i have attached the table .. hope it helps ..
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by caspermonday » Mon Oct 26, 2009 10:24 pm
mehravikas wrote:Can you draw a table please?
Sorry, I got late to answer. I found another link where I explained in details how to use this matrix, see: https://gmatclub.com/forum/probability-b ... ml#p622413
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