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How many 3-character passwords can be made (using letters and digits) if each password must contain at least 2 digits (digits can be repeated)?

How many 3-character passwords can be made (using letters and digits) if each password must contain at least 2 digits (digits can be repeated)?
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How many 3-character passwords can be made (using letters and digits) if each password must contain at least 2 digits (digits can be repeated)?

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User Thekevinscott
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8.1k points

1 Answer

6 votes
At least 9*9*8 * 26*25*24 = 10108800
answered
User Emcpadden
by
8.9k points
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