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All of the stocks on the over-the-counter market are designa

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All of the stocks on the over-the-counter market are designa [#permalink] New post 15 Dec 2011, 17:58
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  25% (medium)

Question Stats:

84% (03:10) correct 16% (01:26) wrong based on 25 sessions
All of the stocks on the over-the-counter market are designated by either a 4-letter or a 5-letter code that is created by using the 26 letters of the alphabet. Which of the following gives the maximum number of different stocks that can be designated with these codes?

a. 2(26^5)
b. 26(26^4)
c. 27(26^4)
d. 26(26^5)
e. 27(26^5)
[Reveal] Spoiler: OA
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Re: All of the stocks on the over-the-counter market are designa [#permalink] New post 15 Dec 2011, 18:10
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no of different stocks for 4-letter code = 26^4
no of different stocks for 4-letter code = 26^5

total = 26^4 + 26^5 = 26^4(26+1) = 27(26^4)


[Reveal] Spoiler:
Option C
Re: All of the stocks on the over-the-counter market are designa   [#permalink] 15 Dec 2011, 18:10
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All of the stocks on the over-the-counter market are designa

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