Probability

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ketkoag: Legendary Member; Posts: 876; Joined: Thu Apr 10, 2008 8:14 am; Thanked: 13 times

by ketkoag » Sun Jun 21, 2009 1:28 am

In a xy-plane, eight points are given. If a point is selected at random, what is the probability that x+2y>10?

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Source: Beat The GMAT — Problem Solving | Sun Jun 21, 2009 1:28 am

rahulg83: Legendary Member; Posts: 575; Joined: Tue Nov 04, 2008 2:58 amFollowed by: 4 members; Location: India; Thanked: 18 times; GMAT Score:710

by rahulg83 » Sun Jun 21, 2009 3:48 am

Are u sure that question is complete?

all 8 points could be "above" the line x+2y=10, probability will be 1.
or 7 points above this line and one below it, answer would be 7/8..

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Stuart@KaplanGMAT: GMAT Instructor; Posts: 3225; Joined: Tue Jan 08, 2008 2:40 pmFollowed by: 614 members; Location: Toronto; Thanked: 1710 times; GMAT Score:800

Re: Probability

by Stuart@KaplanGMAT » Sun Jun 21, 2009 9:34 am

ketkoag wrote:In a xy-plane, eight points are given. If a point is selected at random, what is the probability that x+2y>10?

Some free advice: start posting entire questions, including answer choices, or people will just ignore your posts.

The question as written is unanswerable.

Stuart Kovinsky | Kaplan GMAT Faculty | Toronto

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ketkoag: Legendary Member; Posts: 876; Joined: Thu Apr 10, 2008 8:14 am; Thanked: 13 times

by ketkoag » Mon Jun 22, 2009 3:02 am

i apologize for the inconvenience, i posted it to check whether i am missing something coz i thought the problem is incomplete too, but then i thought there might be some concept that i am not aware of...so to confirm that i am not missing any concept i posted the question as it is..
nyways.. i'm sorry, will check this in future..

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