b.) The letters are case sensitive(that is, an uppercase letter is considered different than the same lowercasea.) The letters are not case sensitive(that is, a lowercase letter is treated the same as an uppercase letter)1.) Passwords: Assume that a password to log onto a computer account is to consist of any four digits orletters(repetition is permitted) Determine the number of passwords possible "letter)

Given, The password contains any four digits or letters and repetition is allowed. The possible…

Answered: b.) The letters are case sensitive(that…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Hi I have a question in my textbook that I am unsure about: A password is a string of length 5, each character of which is from the set (x,y,z) of letters.How many possible passwords are there that use all three of these letters at least once? How would I go about this? What is the answer? Thank you
plz solve this question in detail
The company has agreed on an 8 character password format, comprised of upper case letters , lower case letters, and digits (0-9). Find the number of passwords possible where the first 2 characters have to be upper case letters, the next 5 can be lower case letters or digits , and the last character has to be an upper case letter. Here are the restrictions: a. Repetitions are allowedb. Repetitions are not allowed
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Please explain the answer and show the souloution. Please do not use programming languages this is for discrete math ! 18
- License plates in China begin with a Chinese character designating the province, followed by a letter from the set {A, ... , Z}, followed by a five- character alphanumeric string (using symbols from the set {A,. ,Z,0. 1,...9}). What is the maximum number of plates of this type for a given Chinese province? ....
Compiler Design
Please answer all parts a) b) c) and d) A password is a string of 8 characters taken from the alphabet (that is, the set of 26 characters {a, b, c, ..., x, y, z}), the set of 10 digits {0, 1, 3, 4, 5, 6, 7, 8, 9} and the set of 5 special characters {!, @, #, ∗, +}. a) How many unique passwords are there? b) How many unique passwords are there where no character can be repeated and there are exactly 2 digits? c) How many unique passwords are there where you can repeat characters and there are at least 2 digits? d) How many unique passwords are there where you can repeat characters and have at least 2 digits and at least 1 special character?
3. Your student email account requires you to choose a password of 4 letters followed by 1 of the digits 0 -9. The password can consist of upper case letters (26) or lower case letters (26). How many different five-character passwords can be created? 4. At a swim meet, 8 different swimmers compete in the 800 meter freestyle race. How manydifferent ways are there for these swimmers to finish?
How many 4-letter passwords can you form from the letters A, B, C, D, E, F, G, H, with no letter repeated? a. 8! = 40320 b. 8!/4 = 10080 c. None of the other answers is correct. d. (8/4)! = 2! = 2 e. 8! / 4! = 1680
A user is allowed to create an 8-digit password, but it must satisfy the following requirements: The first 2 spots must be different letters of the alphabet (case is not sensitive) The next 4 spots must be different numbers from the set {0-9} The last 2 spots must be different non-alphanumeric symbols from the set {# , @, $,%} How many passwords are possible?

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