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stocks [#permalink] New post 15 Dec 2011, 18:58
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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: stocks [#permalink] New post 15 Dec 2011, 19:10
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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: stocks   [#permalink] 15 Dec 2011, 19:10
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