How many different computer passwords are possible if each consists of 7 symbols and if the first 3 must be letters and the other 4 must be digits (repetition is NOT allowed)?

Q: Find the number of ways to put eight different books in five boxes, if no box is allowed to be…

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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: How many 4-digit numbers can be formed from 1, 2, 3, 4, and 5 if no repetition is allowed?

A: Given : Numbers = 1,2,3,4 and 5

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: A pizza shop has 18 different toppings available for their pizzas. How many different possible…

A: Given: A pizza shop has 18 different toppings available for their pizzas. Each pizza contains 4…

Q: In the past, a college required students to use a 4 digit PIN (Personal Identification Number) as…

A:

Q: How many different​ 4-letter acronyms can be made if the first letter must be E, X, or P and no…

A: Following solution is provided below

Q: Outside a home, there is a 4-key keypad with letters A, B, C, and D that can be used to open the…

A: Given Outside a home , there is a Keypads with letter= A,B,C,D Number of codes=4

Q: Your school locker has a dial with 50 numbers which required 3 numbers to open.  (It is not a…

A: Your school locker has a dial with 50 numbers which required 3 numbers to open. (It is not a…

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

A:

Q: Janice jogs every 4 days and Jennifer jogs every 3 days. If today is a Tuesday and Janice and…

A: Given, Janice jogs every 4 days and Jennifer jogs every 3 days. Today is a Tuesday and Janice and…

Q: You are selecting a 7 character password using 4 letters and 3 numbers ( from 0-9 ), without…

A: The following solution is given below :

Q: Outside a home, there is a 5-key keypad with letters A, B, C, D and, E that can be used to open the…

A: 5 key keypad with letter A,B,C,D,E.the key can be used to open the garage if the correct five-letter…

Q: How many different 2 letter passwords can be formed from the letters A, B, C, D, E, and F if no…

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Q: How many ways can you have a 6-digit passcode on your phone if you start with a 9 and none of the…

A: We need to find the number of ways to have a 6-digit passcode, given that the first digit is 9 and…

Q: In how many ways can you arranged 2 Math books, 3 Science books and 3 English books if only one book…

A: The total number of mathematics books are 2. The total number of science books are 3. The total…

Q: How many different four-letter passwords can be formed from the letters A, B, C, D, E, F, G and H if…

A:

Q: password contains 2 letters and 2 digits.  How many passwords are possible if repetitions are NOT…

A: The number of letters is 2 and the number of words is 2.

Q: A 16-bit string is a sequence of 16 symbols, each symbol a 0 or a 1. How many 16-bit strings are…

A: A bit string is a sequence of  symbols, each symbol a  or a We have to find the possible number of…

Q: how many five letter codes can be made if each chosen letter (from the the original 7 letters) can…

A:

Q: A state makes license plates with two letters followed by four numbers. if no repetitions of the…

A: The license plates must consist of two letters followed by four numbers.

Q: How many different seven-digit telephone numbers can be formed if the first digit cannot be zero?

A:

Q: a) How many plates are possible when letters and numbers can repeat? Set up the expression that can…

A:

Q: A briefcase lock opens with the correct 4 digit code. If the digits can be any number from 1-9 with…

A: Given: Digit is from 1 to 9   Unit must be = 3,6,9 that mean 1 of these 3 Other 3 are from 1-8 ,…

Q: How many strings of three decimal digits (each digit can be 0-9) do not contain the same digit three…

A: Solution :-

Q: A computer password is required to be 5 characters long. How many passwords are possible if the…

A: Given dataa computer password is required to be 5 cgaracters longThe password requires 2 letters…

Q: I need to create a password for my bank account. I would choose each of the first 5 characters of…

A: Here we solve the number of possible way to make a password...

Q: How many different three-number “combinations” are possible on a combination lock having 46 numbers…

A: Given,A lock having 46 numbers on its dial.

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: How many seven-digit numbers can be made from the digits 1 to 9 if repetition is allowed?

A: Given that  To find the number of ways of 7 digit number can be made from the 1 to 9

Q: A certain website requires a password to be 6 characters in length. Two of the characters must be a…

A: From the provided information, A certain website requires a password to be 6 characters in length.…

Q: How many four digit codes can be made out of the digits 0,2,4and 8 if the repetition of digits is…

A: We have to find four digit codes can be made out of the digits 0,2,4and 8 ....

Q: You need to create a four digit code. You can use the digit 035. The first is it cannot be zero. And…

A: We have to find given no. Of arrangement.