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[obm-l] Combinatória III

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Subject: [obm-l] Combinatória III
From: "Marcelo Roseira" <mroseira@xxxxxxxxxx>
Date: Wed, 14 May 2003 14:32:20 -0300
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Com os algarismos 1, 2, 3, 4, 5, 6, 7, 8 e 9, quantos números com algarismos distintos existem entre 500 e 1000?

(A) 400. (B) 405. (C) 9³. (D) 9!. (E) 810.

Grato.

Marcelo.

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