Each character in a password of length six can be any uppercase letter from A-Z or any symbol from the list: %,&,$,#,@. For this problem, you may leave your answers unreduced. (a) How many passwords are possible? (b) How many passwords are possible that do not repeat any letters or symbols? (c) How many passwords are possible that have at least one character repeated?
Each character in a password of length six can be any uppercase letter from A-Z or any symbol from the list: %,&,$,#,@. For this problem, you may leave your answers unreduced. (a) How many passwords are possible? (b) How many passwords are possible that do not repeat any letters or symbols? (c) How many passwords are possible that have at least one character repeated?
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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Each character in a password of length six can be any uppercase letter from A-Z or any symbol from the list: %,&,$,#,@. For this problem, you may leave your answers unreduced.
(a) How many passwords are possible?
(b) How many passwords are possible that do not repeat any letters or symbols?
(c) How many passwords are possible that have at least one character repeated?
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