Answer to Question #313668 in Statistics and Probability for Kayla

Question #313668

How many different ID cards can be made if there are 9 digits on a card and no digit can be used more than once? What if digits can be repeated?

Expert's answer

Without repetition: "N=10*9*8*7*6*5*4*3*2=3626800" .

With repetition: "N=10^9=1000000000."

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