Employees of large corporation are to be issued special codded identification cards. The code consists of 4letters of the alphabet. Each letter can be used for 4 times. How many different 10 cards can be used?

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Originally Posted by jay200032

Employees of large corporation are to be issued special codded identification cards. The code consists of 4letters of the alphabet. Each letter can be used for 4 times. How many different 10 cards can be used?

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Dear Jay :

Before going on, how do you define "10 card"?? A card with a combination of 10 of the available characters in the entire pool??

:)

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