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# Queens and Diamond

Author Message
Manager
Joined: 29 May 2008
Posts: 110

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16 Jun 2009, 06:25
00:00

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Question Stats:

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What is the probability of drawing a queen or a diamond from a normal shuffled deck?

a) 2/3
b) 4/13
c) 17/52
d) 16/51
e) 1/4

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Current Student
Joined: 13 May 2008
Posts: 141
Schools: LBS

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16 Jun 2009, 07:05
1
b) 4/13...

there are 4 Queens and 13 diamonds IN A 52 deck card.. so:

P(queen or diamond) = P(queen) + P(diamond) − P(queen and diamond)
P(queen or diamond) = (4/52) + (13/52) − (1/52)
P(queen or diamond) = 16/52
P(queen or diamond) = 4/13..

hope that helps you understand it!
Manager
Joined: 29 May 2008
Posts: 110

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16 Jun 2009, 08:18
Absolutely now I got it
Current Student
Joined: 13 May 2008
Posts: 141
Schools: LBS

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16 Jun 2009, 08:39
1
i don't get no kudos!!!
Manager
Joined: 16 Apr 2009
Posts: 213
Schools: Ross

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19 Jun 2009, 21:27
One kudo for MJ2009...
Your post helped me a lot...
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Keep trying no matter how hard it seems, it will get easier.

Manager
Joined: 07 Jun 2009
Posts: 187

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19 Jun 2009, 22:37
MJ2009 wrote:
b) 4/13...

there are 4 Queens and 13 diamonds IN A 52 deck card.. so:

P(queen or diamond) = P(queen) + P(diamond) − P(queen and diamond)
P(queen or diamond) = (4/52) + (13/52) − (1/52)
P(queen or diamond) = 16/52
P(queen or diamond) = 4/13..

hope that helps you understand it!

Good explanation
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Director
Joined: 04 Jan 2008
Posts: 826

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19 Jun 2009, 23:15
Simply awesome
more because of the datailing part
+1 from me as well

MJ2009 wrote:
b) 4/13...

there are 4 Queens and 13 diamonds IN A 52 deck card.. so:

P(queen or diamond) = P(queen) + P(diamond) − P(queen and diamond)
P(queen or diamond) = (4/52) + (13/52) − (1/52)
P(queen or diamond) = 16/52
P(queen or diamond) = 4/13..

hope that helps you understand it!

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

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Re: Queens and Diamond   [#permalink] 19 Jun 2009, 23:15
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