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Mathematics 7 Online
OpenStudy (anonymous):

How many codes consisting of a letter followed by 3 digits can be made if no digit can be used more than once?

OpenStudy (anonymous):

= 10*9*8=720

OpenStudy (anonymous):

26 letters x 10 possible numbers x 9 remaining possible numbers x 8 remaining possible numbers = 18720

OpenStudy (anonymous):

ty

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