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How many ways can a password be created with 3 lowercase letters and 1 numeric digit, if letters can be used more than once?

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Either 17,576 or If you use Lowercase and Uppercase then 140,608

Step-by-step explanation:

26 * 26 * 26 = 17,576.

Or, if you allow both capital and lowercase letters and the passwords are case-sensitive:

52 * 52 * 52 = 140,608.
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