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How many 8-letter passwords are possible

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Question:

Using only the 26 capital letters of the alphabet, how many 8-letter passwords are possible?

Repeat Step 1 but do not allow the same letter to be used more than once in the password.

Repeat Steps 1 and 2 using an encryption alphabet that contains 26 upper-case letters, 26 lowercase letters, and the digits 0 through 9

Reference no: EM13849379

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