baidentheodore30771 baidentheodore30771
  • 07-03-2024
  • Mathematics
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Consider n-digit numbers where each digit is one of the 10 integers 0, 1, ..., 9. How many such numbers are there for which:
a) All digits are unique
b) At least one digit is repeated
c) All digits are odd
d) All digits are even

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