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Source: — Problem Solving |
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by gmat740 » Sat Jul 18, 2009 11:15 am
The formula for probability goes on like this

P(a U b) = P(a) + P(b) - P(a & b)
we have been asked about P(a U b)

Where,
P(a) = Prob of ball is white
P(b) = Prob the ball has even number

1. P(a & b) = 0

2. P(a) - P(b) = 0.2

Using both, we still can't solve

Hence E
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by PussInBoots » Sun Jul 19, 2009 3:14 pm
Could someone PLEASE tell me what site is that screenshot from?
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by zenithexe » Sun Jul 19, 2009 3:23 pm
PussInBoots, Those are from GMAT prep, mba.com when you sign up for the actual GMAT test, you have an option to have them send the GMAT prep CD (Practice test from GMAT people) or download it from their site. It contains two CAT tests, and practice questions for each sections of the GMAT.
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by PussInBoots » Sun Jul 19, 2009 3:34 pm
Thank you so much zenithexe.

Is this what you are talking about? https://www.mba.com/mba/thegmat/download ... SLSwitch=1
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by zenithexe » Sun Jul 19, 2009 3:39 pm
Yes, that is indeed what I'm talking about. You need to register first though.
PussInBoots, please PM me if you got more questions that is not related to questions posted.

Sorry, trust123, I guess this is getting off topic.

Thanks
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