Suppose a password for a computer system must have at least 7, but no more than 11 characters where each character in the password is a lower case English letter, an uppercase English letter, a binary digit, or one of seven special characters (*,>,<,!,+,-,$) How many of these passwords contain at least one occurrence of at least one of the seven special characters?

Q: 2) Each type of machine part made in a factory is stamped with a code of the form…

A: We can use :- 26 letters, 10 digits, 10 digits (as digits can be repeated)   Total number of…

Q: How many distinct 5-letter strings can be created using the letters A, B, C, D, E if repetition is…

A:

Q: How many permutations of the 26 letters in the English alphabet contain the string abc and end on…

A: We have to find the number of permutations.

Q: How many 8-bit strings of weight 5 start with 101 or end with 10 or both?

A: If the 8-bits strings has a weight of 5, then From the 8 places to have digits, there are 5 places…

Q: A nine character password has been randomly assigned by using capital and lower case letters. In how…

A: Given : A nine character password has been randomly assigned by using capital and lower case letters

Q: A permutation lock will open when the right choice of three numbers (from 1 to 30, inclusive) is…

A: A permutation lock will open when the right choice of three numbers (from 1 to 30, inclusive) is…

Q: How many different passwords are possible? If a cell phone’s password consists of eight characters,…

A: Given that cell phone's password consists of eight characters. first character is 6. The number of…

Q: How many bit strings of length eight either start with the bits 11 or end with the bits 00?

A: Consider the provided question, We need to find the number of bit strings of length eight either…

Q: assume that there 8 fire stations that need new chiefs and 12 qualified candidates In how many…

A: Given that, There are 8 fire stations Number of qualified candidates = 12

Q: Let us say that we are going to create eight letter passwords from a set of 23 letters (all of the…

A: There are 23 alphabets, 10 numerics and 5 symbols.

Q: How many bit strings of length seven either begin with two 0s or end with three 1s?

A: Let A be the number of strings that begin with two 0's Therefore. first two places can be filled in…

Q: A ternary bit string is a string of digits from {0, 1, 2}. How ternary bit strings are there of…

A: Solution of the problem as follows

Q: How many bit strings contain exactly eight Os and 10 Is if every 0 must be immediately followed by a…

A: Solution

Q: How many strings are there over the set {a, b, c} that have length 10 in which no two consecutive…

A:

Q: assume that there 8 fire stations that need new chiefs and 12 qualified candidates. In how many…

A: We have to find  number of ways..

Q: How many computer passwords of length 3 you can make out of given 5 characters a. if repetition of…

A:

Q: How many bit strings contain exactly eight 0s and 10 1s if every 0 must be immediately followed by a…

A: Here we will use the concept of combination and the formula for combination is given by C(n,r) =…

Q: How many 10-bit strings are there if the string must start with 001 or 10?

A: By using the given information the solution is given as follows

Q: Let's suppose that a password must contain 4 characters, where a character can be any of the digits…

A: Total number of digits = 5 Total number of letters = 26 Total options are 5 numbers + 26 letters =…

Q: In how many distinct ways can the digits in the number 1,238,229,168 be arranged?

A: We have to find in how many ways the number  1,238,229,168 can be arranged.

Q: Suppose a password for a computer system must have at least 7 but no more than 11 characters where…

A:

Q: How many bit strings of length n, where n is a positive integer, start and end with 1s

A: First place 1 at the start and end of the n bit string. Then there are n-2 bit strings.

Q: How many different strings can be made from the letters in ATTRACTION, using all the letters, if all…

A: The given word is ATTRACTION

Q: How many binary strings of length 5 have at least 2 adjacent bits that are the same (“00” or “11”)…

A: Given: Number of ways to fill each place = 2 (0 or 1) Total number of possible binary strings= 25…

Q: How many strings of seven lower case letters of the English alphabet contain exactly four letters w…

A: We have to use permutations and combinations here.

Q: Suppose you are going to make a password that consists of 5 characters chosen from…

A: The given number of characters is n = 9, characters are: {2,3,6,7,a,c,k,n,p} In order to choose k…

Q: Each character in a password of length six can be any uppercase letter from A-Z or any symbol from…

A:

Q: Determine the number of strings of length 10 from the alphabet {A, B, C} that contain exactly 3 A's…

A:

Q: How many bit strings of length n, where n is a positive integer, start and end with 1s?

A: Given: String length is n,where n is positive integer. Any place to fill in the string there are…

Q: Use pigeonhole principle 1. How many numbers must be selected from the set {1, 3, 5, 7, 9, 11, 13,…

A:

Q: Each character in a password of length six can be any uppercase letter from A-Z or any symbol from…

A: Given information: Total number of letters that can be used for password = 26 Total number of…

Q: How many Binary strings of length 7 do not start with zero?

A: Total number of binary strings of length n is 2n Total number of binary strings of length 7 is 27…

Q: write a program to evaluate even numbers for [1,10],and [11,20]respectively in matlab

A: Even numbers for [1,10] is given below-

Q: How many bit strings of length 10 contain at least three 0's and at least four 1's?

A: According to the given information it is required to find the numbers of bit strings of length 10…

Q: Suppose each license plate in a certaln state has two digits, followed by two letters, followed by…

A: The license plate consists of two digits, followed by two letters, followed again by two digits.…

Q: A product code consists of a one or two-digit number (including 0) followed by 3 not necessarily…

A: A product code consists of a one or two-digit number (including 0) followed by 3 not necessarily…

Q: Suppose a password must be express by selecting digits for 5 places, the allowable digits being 0,…

A: Although, the example of a typical password is 332401, a 6 digit number, the first sentence of the…

Q: Suppose that a password for a locked door must have at least 8 characters, where each character in…

A: It is given that password can be a lowercase English letter, an uppercase English letter or a digit.…

Q: A password must have 2 letters from the school acronym SSPU and 3 digits from 1 to 9. How many…

A:

Q: 5 can be formed if the alphabet (set of avail

A: To find: Number of strings of length 5 that can be formed with {a,b,c} with last character not as b.

Q: A decimal string is a string over the alphabet of the 10 characters: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}.…

A: Given that a decimal string is a string over the alphabet of the 10 characters 0,1,2,3,4,5,6,7,8,9.…

Q: A security code of four digits from digits 0 to 9 must be entered in a definite order. How many…

A: From the information given in the question we know that, Repetition of digits is allowed The…

Q: Don't copy from google or other sites  How many bit strings of length 11 contain either five…

A: Given, the strings of length 11 contain either five consecutive 0s or five consecutive 1s.

Q: How many strings are there of length 6 over the alphabet {a, b, c, A, B} in which exactly two of the…

A: we have the alphabet a,b,c,A,B Now, we are interested in string of length 6. Since two of the…

Q: How many permutations of all the letters in the English alphabet contain the string abc and the…

A: There are 26 letters in the English alphabet

Q: 4. A password to a vault must have at least 8 characters where each character can be an English…

A: It is given that password can be  English letter or a digit. So available characters are:…

Q: A computer access password consists of from three to ten letters chosen from the 28 in the Arabic…

A: The part b of the can we solved by using the permutation.

Q: A bank password consists of SIX (6) letters of the Roman characters (small and capital letters)…

A: We need to determine the number of different passwords possible using the letters of Roman…

Q: How many permutations of the 26 letters (English alphabet) do not contain any of the strings zero,…

A: Total number of permutations of 26 letters  (N) = 26! Number of permutations in which ZERO always…