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The Pin numbers for a cash card at the bank contain four digits 1-9. All codes are equally likely. Find the number of possible Pin numbers.
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The Pin numbers for a cash card at the bank contain four digits 1-9. All codes are equally likely. Find the number of possible Pin numbers.

User Clexmond
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Answer: A 4 digit PIN number is selected. What is the probability that there are no repeated digits? ... There are 10 possible values for each digit of the PIN (namely: 0 ..

Explanation:

User Maxem
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