Mathematics

Mathematics, 21.07.2019 11:30, vegasherlyn

Acombination lock requires 4 selections of numbers, each from 1 to 20. • how many different combinations are there? • suppose that the lock is constructed in such a way that no number maybe used twice. how many different combinations are possible?

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Acombination lock requires 4 selections of numbers, each from 1 to 20. • how many different combinat...

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