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Discrete Math 12 Online
OpenStudy (anonymous):

The following problem refers to strings in A, B, ..., Z. How many four-letter strings are there that begin with J ?

OpenStudy (anonymous):

25^4

OpenStudy (anonymous):

The reason why is because you can use any other letter than j so , since there are 26 letters initially you simply just subtract by 1 and you are left with 25 possible letters to use.

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