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# 12 Jurors must be picked from a pool of n potential jurors.

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Director
Joined: 17 Oct 2005
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12 Jurors must be picked from a pool of n potential jurors. [#permalink]  05 Nov 2005, 18:12
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12 Jurors must be picked from a pool of n potential jurors. If m of the potential jurors are rejected by the defense counsel and the prosecuting attorney, how many different possible juries could be picked from the remaining potential jurors?

1) if one less potential juror had been rejected, it would have been possible to create 13 different juries

2) n=m+12
Senior Manager
Joined: 02 Oct 2005
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Ans: D

Stmt 1)
nC12 = n ! / (n-12)! 12!

13 = n!/(n-12)! 12!

n = 13. Hence SUFF.

Stmt 2) is straight forward. Hence SUFF.

Please correct me if I am wrong.
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