Question: Serial numbers for a product are to be made using3 letters followed by3 digits. The letters are to be taken from the first9 letters of

Serial numbers for a product are to be made using3

letters followed by3

digits. The letters are to be taken from the first9

letters of the alphabet, with no repeats. The digits are taken from the10

digits0,

1,

2,

...

,

9

, with no repeats. How many serial numbers can be generated?

(If necessary, consult alist of formulas.)

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