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How many functions are there from a set with 3 elements to a set with 4 elements?
How many functions are there from a set with 3 elements to a set with 4 elements?
Under the old North American numbering plan, how many telephone numbers were possible?
Under the old North American numbering plan, how many telephone numbers were possible?
Under the new North American numbering plan, how many telephone numbers are possible?
Under the new North American numbering plan, how many telephone numbers are possible?
What is the number of different subsets of a finite set S with 5 elements?
What is the number of different subsets of a finite set S with 5 elements?
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