Suppose a certain combination lock requires three selections of numbers, each from 1 through 20. (a) How many different combinations are possible? (b) Suppose the locks are constructed in such a way that no number may be used twice. How many different combinations are possible?
Suppose a certain combination lock requires three selections of numbers, each from 1 through 20. (a) How many different combinations are possible? (b) Suppose the locks are constructed in such a way that no number may be used twice. How many different combinations are possible?
Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter14: Counting And Probability
Section14.CT: Chapter Test
Problem 3CT: An Internet service provider requires its customer to select a password consisting of four letters...
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Suppose a certain combination lock requires three selections of numbers, each from 1 through 20.
(a)
How many different combinations are possible?
(b)
Suppose the locks are constructed in such a way that no number may be used twice. How many different combinations are possible?
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