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stiv31 [10]
3 years ago
6

A combination lock requires 4 selections of numbers, each from 1 to 20. • how many different combinations are there? • suppose t

hat the lock is constructed in such a way that no number maybe used twice. how many different combinations are possible?
Mathematics
1 answer:
slamgirl [31]3 years ago
6 0
NUmber of combination = 20 x 19 x 18 x 17 = 116 280

Answer:  116 280
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Missing part of question:

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See attachment

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Required

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