6. A website has some requirements for its passwords. The passsword must be of length 6,7 or 8 characters. Every character must be a digit or a lower case english letter. The password CANNOT begin with "123456". (For example, passwords like "123456", "123456ab" are NOT allowed.) How many different possible passwords are there?

Q: Student Identification Numbers at a certain college must have four letters followed by three numbers…

A: Introduction: It is required to calculate the number of ID’s that the college can issue.

Q: A seven-character insurance account number must be four lowercase letters of the alphabet followed…

A: The number of lowercase letters in the alphabet is 26.

Q: 7. You need to select a three-character password for a new online bank account. The rules are: you…

A: Permutation - The different arrangements of a given number of things by taking some or all at a…

Q: each character in a password is either a digit(0-9) or lowercase letter (a-z). how many valid…

A: There is total 10 digits, such that 0, 1, 3, …., 9 and there is total 26 lowercase letters, such…

Q: For some particular website, the password must start with one of the letters A, B, or C. Then there…

A:

Q: How many four-letter passwords can you form with the letters a,b,c,d,e,f,g,h,i,j?  a. 10^4 =…

A: It is an important part of statistics. It is widely used.

Q: A gate has a standard key pad with the digits 0 through 9. How many possible code combinations are…

A: Given : A gate has a standard key pad with the digits 0 through 9 To find : total number of possible…

Q: To keep computer files secure, you create a six character password. Characters can be letters or…

A: There are total 26 letters (A-Z) And 10 digits (0-9) So total (26+10)=36 choices for each character.…

Q: an iPhone locks with a 5-digit code. How many codes are possible, if repetition isnot allowed and…

A: Lock of 5 digit code , Repetition is not allowedFirst digit must be 9 Number of codes = ?

Q: Outside a home, there is an 8-key keypad numbered 1 through 8. The correct five-digit code will open…

A: There are totally 8-key keypad numbers. The correct five-digit code will open the garage door. The…

Q: 4.aJuaquin is picking a code for his computer password. His password must contain 3 letters and 4…

A:

Q: 21. Bank checks. Determine the check digits for the following bank codes: 0 25 7 1 1 0 8 .

A: The given code is: 0 2 5 7 1 1 0 8 _

Q: Every Wayne State student has an access id; the 6-character name consisting of 2 letters (a-z)…

A: Students id consists of 6 characters out of which the first two characters are from (a -z) and which…

Q: To enter their home the rouse family enters a 6 character code consisting of 4 letters (uppercase of…

A: We have to find 6 character code consisting of 4 letters (uppercase of lowercase) and 2 digits if…

Q: How many different unique passwords could be made by rearranging the following characters? M A T H E…

A: How many different unique passwords could be made by rearranging the following characters? M A T H E…

Q: An identity thief is trying to break into someone's computer that is protected by a 4-digit passcode…

A:

Q: A website instructs users to create a password using 4​ alphanumeric characters (letters or digits).…

A: We have given that a website instructs users to create a password using 4​ alphanumeric characters…

Q: Suppose we want to form four-digit numbers using the set of digits {0,1, 6, 7, 9}. For example, 9071…

A: The first number can be selected in 4 ways. [ Any number from {1,6,7,9} ] The second number can be…

Q: An IP address can be written as a 32-bit number. For a class B network, the two most significant…

A: Given that : An IP address can be written as a 32 bit number for a class B network the two most…

Q: You are asked to create a six character password and each character can be any of the 26 letters of…

A: Given: Number of alphabets=26 Number of numerical 2 through 9=8 Total number of characters, n=34 The…

Q: Assume that we have numbers from 0 to 9 in a small box (0,1,2,3,4,5,6,7,8,9); there is only one from…

A: Solution:-To determine the number of 5-digit numbers that can be generated respecting the given…

Q: Every Wayne State student has an access id; the 6-character name consisting of 2 letters (a-z)…

A: a) Calculating the total number of ways: The access id consist 6 character name consisting 2 letters…

Q: How many different four letter secret codes can be formed if the first letter must be an S or a T ?

A: The experiment is to form four-letter secret codes. The condition is the first letter must be an S…

Q: How many posible 5-digit zip codes exist if the first number must be from 3 and 9, the last number…

A: We have given that 5-digit zip codes exist if the first number must be from 3 and 9, the last number…

Q: A website instructs users to create a password using 4 alphanumeric characters (letters or digits).…

A: Answer:- We know that,  Total number of letters = 26 (A to Z and Capitalization doesn't matter)…

Q: to use an automated teller machine at a certain bank, you must enter a 6-digit code, using digits…

A: Suppose that the repetition of digits is permitted, there are  choices  for each digit in the -digit…

Q: To use an automated teller machine at a certain bank, you must enter a 4-digit code, using the…

A: Total available numbers = 9 To make 4 digit code

Q: How many such passwords are possible that end in the letter Z?

A: A website instructs users to create a password using 3​ alphanumeric characters (letters or digits).…

Q: Ahmed must choose a seven-digit PIN number and each digit can be chosen from 0 to 9. How many…

A: We have to find no. of possible pins.

Q: The digits 1, 2, 3 and 4 can be arranged to form different four-digit codes. a. Find the number of…

A:

Q: For some particular website, the password must start with one of the letters a b or c. Then there…

A: Introduction: As the English alphabet has 26 letters from A to Z, and there are 10 digits from 0…

Q: A corporate password consists of four digits, followed by three lower-case letters of the alphabet.…

A: The password is 4 digits long followed by three lower-case letters.

Q: A retailer uses a lock box to store the keys to a house that is for sale. The access code for the…

A: Given Lock box consist of no.of digits=6Total no.of digits =10                   (i.e.,…

Q: Outside a home, there is a 9-key keypad with letters A, B, C, D, E, F, G, H, and I that can be used…

A: Permutation: It defines the number of possible ways an object can be arranged or ordered. The…

Q: A code for an alarm system is made up of two letters, followed by four digits. How many codes can be…

A: There are 26 letters [A-Z] There are 10 digits. [0-9] a) We can pick the 2 letters each in 26 ways…