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?
Chapter8: Sequences, Series,and Probability
Section: Chapter Questions
Problem 40CT: There are 10 applicants for three sales positions at a department store. All of the applicants are...
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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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