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# Probability Question - GMATPREP

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Senior Manager
Joined: 01 Feb 2005
Posts: 270

Kudos [?]: 112 [0], given: 1

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02 Jun 2006, 09:56
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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Kudos [?]: 112 [0], given: 1

VP
Joined: 21 Sep 2003
Posts: 1057

Kudos [?]: 82 [0], given: 0

Location: USA

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02 Jun 2006, 11:16
of the expressions on (x-y)*(x+y) results in a product of the form x^2-(by)^2.

Num of possible expressions are 4C2 = 6
Hence Prob = 1/6
_________________

"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."

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Kudos [?]: 82 [0], given: 0

Senior Manager
Joined: 01 Feb 2005
Posts: 270

Kudos [?]: 112 [0], given: 1

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02 Jun 2006, 11:18
Thanks a lot. I just got the answer a second or 2 before you provided the solution. But Thanks anyways!!

Kudos [?]: 112 [0], given: 1

Intern
Joined: 29 Apr 2006
Posts: 14

Kudos [?]: [0], given: 0

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02 Jun 2006, 18:10
Its 1/4c2=1/6. Only one combination of products [(x+y)(x-y)] will yeild a result in the form of x^2-(by)^2.

Kudos [?]: [0], given: 0

02 Jun 2006, 18:10
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# Probability Question - GMATPREP

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