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Mathematics

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A combination 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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Аноним Аноним

Today at 4:57 AM

NUmber of combination = 20 x 19 x 18 x 17 = 116 280

Answer: 116 280

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