2007 UNCO Math Contest II Problems/Problem 10
Problem
A quaternary “number” is an arrangement of digits, each of which is Some examples:
(a) How many -digit quaternary numbers are there in which each of appear at least once?
(b) How many -digit quaternary numbers are there in which each of appear at least once? Test your answer with
(c) Generalize.
Solution
See Also
2007 UNCO Math Contest II (Problems • Answer Key • Resources) | ||
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