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A warranty identification number for a certain product consists of a letter of the alphabet followed by a six-digit number. How many possible identification numbers are there if the first digit of the
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A warranty identification number for a certain product consists of a letter of the alphabet followed by a six-digit number. How many possible identification numbers are there if the first digit of the six-digit number must be nonzero?

User Paxx
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has to be 720 ...............
User Kelan
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