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# A certain stock exchange designates....

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Intern
Joined: 03 Apr 2018
Posts: 11
A certain stock exchange designates....  [#permalink]

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06 Jul 2018, 00:31
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A certain stock exchange designates each stock with a one-, two-, or three-letter code, where each letter is selected from the 26 letters of the alphabet. If the letters may be repeated and if the same letters used in a different order constitute a different code, how many different stocks is it possible to uniquely designate with these codes?

A.2,951

B.8,125

C.15,600

D.16,302

E.18,278

Math Expert
Joined: 02 Sep 2009
Posts: 49206
Re: A certain stock exchange designates....  [#permalink]

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06 Jul 2018, 00:34
ItachiPu wrote:
A certain stock exchange designates each stock with a one-, two-, or three-letter code, where each letter is selected from the 26 letters of the alphabet. If the letters may be repeated and if the same letters used in a different order constitute a different code, how many different stocks is it possible to uniquely designate with these codes?

A.2,951

B.8,125

C.15,600

D.16,302

E.18,278

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Re: A certain stock exchange designates.... &nbs [#permalink] 06 Jul 2018, 00:34
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