Each character in a password is either a digit [0-9] or lowercase letter [a-z]. How many valid passwords are there with the given restriction(s)? Length is 8 or 12

Q: How many strings of length 5 can be formed if the alphabet (set of available characters)is {a,b,c}…

A: When there are nth places and m elements. With repetition, the choice of 1st place will be m, the…

Q: Assuming that the password is NOT case-sensitive and that letters can be used more than once, how…

A: The number of not case-sensitive letters 26. They are a, b, c,….,z.

Q: How many strings of length two can be formed by using the letters A, B, C, D E and F without…

A: Given letters, A, B, C, D, E, F We have to find number of strings of length two

Q: A lock code requires 3 digits followed by 2 letter(s). How many different lock codes are possible?…

A:

Q: How many different passwords are there that contain only digits and lower-case letters and satisfy…

A: Given, no. of digtis = 10  (0 to 9) no. of letters = 26  (a to z) Total = 36 (iii) Password must…

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

A:

Q: Suppose each license plate in a certain state has four letters followed by two digits. The letters…

A: A license plate has four letter letters followed by two digits excluding I, O, Q, U and 0, 1, 2, 3.

Q: A passcode is to be created from 2 letters, 2 digits, and 2 special characters (consisting of ?,!,…

A: Combination only includes number of ways of selection whereas, permutation includes number of ways…

Q: If three alphabets are to be chosen from A, B, C, D and E such that repetition is not allowed then…

A: In question, Given that A, B, C, D and E are 5 alphabets then three alphabet are chosen from them…

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

A: The total 10 digits are 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.

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

A:

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: Determine the number of six-character passwords that can be formed using two letters from A to F and…

A: From A to F there are 6 letters. We can pick 2 letters from 6 letters in 6C2=15 waysIn 1 to 9 there…

Q: To use an automated teller machine at a certain bank, you must enter a 3-digit code, using the…

A:

Q: Everybody at a company is assigned a unique 9 digit ID. How many unique IDs exist?

A: Hello, thanks for posting your question here.  Since you have posted a question with multiple…

Q: How many unique codes are possibly formed from two characters, where the first character can be 2 to…

A:

Q: How many four-digit passwords can be made from the digits 0 to 5, if digits can be repeated?

A: From 0 to 5 there are 6 digits.  Given that the digits can be repeated. This means for each digit…

Q: If every telephone in the world is assigned a number that contains a country code 1 to 3 digits…

A: The telephone number has a country code first, followed by 12 digit telephone number of the form…

Q: How many phone numbers are possible in the (404) area code of the form ABC-XXXX if: A is restricted…

A: number of ways in which A can be selected (2-9) = 8 ways  number of ways in which B can be selected…

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: A seven-character computer password can be any three letters of the alphabet, followed by two…

A: Given, A seven-character computer password can be any three letters of the alphabet, followed by two…

Q: How many different strings of size 2 can be made using all the letters in the word GOOGOL?

A: Given word = GOOGOL. Number of different letters present in the given word = G,O,L  According to the…

Q: How many bit strings are there of length six or seven

A: The number of bit strings of length six is given by 26 The number of bit strings of length seven is…

Q: From the letters {A, B, C, D, E, F. G}, how :many 3-distinct-letters codes can be (a) generated? (b)…

A: a) 7C3 distinct codes can be generated by {A,B,C,D,E,F,G} which is equal to 21

Q: Consider a necklace that is made up of 8 different gems stone such that ruby is always between…

A: As per our guidelines we can answer only one question. please repost other seperately.    7.

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: Suppose that in a certain state, all automobile license plates have three uppercase letters followed…

A: There are 26 letters [A-Z] and 10 digits [0-9] d) If the letters and digits are distinct then we can…

Q: How many strings of three decimal digits

A: Strings of three decimal digits:

Q: Each symbol in the Braille code is represented by a rectangular arrangement of six dots, each of…

A: We have to find the total symbols represented in braille code with at least one of the six dots must…

Q: How many 98-element subsets does [100] have? (Here [100] is the set consisting of the first 100…

A: Given: Let us consider n be the number of elements in the set and r be the elements-subsets. Then, n…

Q: How many 12-bit strings start with 101 or end with 10 or both?

A: Here the 12-vit string is the string of length 12. And to find the number of specific types of…

Q: Let A denote the set of all 4 digit numbers that are divisible by 3, and B denote the set of all 4…

A:

Q: Suppose that two letters are to be selected from A, B, C, D, and E and arranged in order. How many…

A: Given: Two letters are to be selected from A, B, C, D, and E and arranged in order. There are in…

Q: Each character in a password is either a digit [0-9] or lowercase letter [a-z]. How many valid…

A: Permutation and combination used to calculate the number of possible ways to arrange or select a…

Q: Each character in a password is either a digit [0-9] or lowercase letter [a-z]. How many valid…

A: Given: Each character in a password is either a digit [0-9]  There are 10 digits as…

Q: the minimum and maximum numbers that can be represented in two’s complement in 6 bits?

A: We have to find the minimum and maximum numbers that can be represented in two’s complement in 6…

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

A:

Q: a lock has a code of 3 numbers between 1 and 20. if no numbers in the code are allowed to repeat,…

A: Permutation and combination are used to calculate the number of possible ways to arrange or select a…

Q: How many 9-bit strings start with 101 or end with 10 or both?

A: How many 9-bit strings start with 101 or end with 10 or both. There are 9-bits, and we start with…

Q: Suppose each license plate in a certain state has one digit, followed by four letters, followed by…

A: FORMAT of number = 9AAAA9 (1 number, 4 letters, 1 number) A license plate has six spaces to be…

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 possible passwords can be formed from the letters: ASSISTANT_TITAN ? How many different…

A: Permutation is arrangement of number of objects in definite order. npr=n!n-r!

Q: To use an automated teller machine at a certain bank, you must enter a 3-digit code, using the…

A: We want to find the number ways to make 3 digit number.

Q: How many strings of four different hexadecimal digits are there?

A:

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 length-4 lists can be made from the symbols A, B, C, D, E that contains at least one letter…

A:

Q: ) Suppose in a university, each subject offered to students has a subject code consisting of four…

A: Permutation is a technique to obtain the possible arrangements of listed items in linear order. It…