Consider the following definitions for sets of characters: • Digits = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} • Letters = {a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z} • Special characters = {∗, &, $, #} Compute the number of passwords that satisfy the given constraints. (i) Strings of length 7. Characters can be special characters, digits, or letters, with no repeated characters. (ii) Strings of length 6. Characters can be special characters, digits, or letters, with no repeated characters. The first character can not be a special character.
Consider the following definitions for sets of characters: • Digits = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} • Letters = {a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z} • Special characters = {∗, &, $, #} Compute the number of passwords that satisfy the given constraints. (i) Strings of length 7. Characters can be special characters, digits, or letters, with no repeated characters. (ii) Strings of length 6. Characters can be special characters, digits, or letters, with no repeated characters. The first character can not be a special character.
Elementary Geometry for College Students
6th Edition
ISBN:9781285195698
Author:Daniel C. Alexander, Geralyn M. Koeberlein
Publisher:Daniel C. Alexander, Geralyn M. Koeberlein
Chapter1: Line And Angle Relationships
Section1.6: Relationships: Perpendicular Lines
Problem 20E
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Consider the following definitions for sets of characters:
• Digits = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
• Letters = {a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z}
• Special characters = {∗, &, $, #}
Compute the number of passwords that satisfy the given constraints.
(i) Strings of length 7. Characters can be special characters, digits, or letters, with no repeated characters.
(ii) Strings of length 6. Characters can be special characters, digits, or letters, with no repeated characters. The first character can not be a special character.
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