How many computer passwords can be generated if it must consist of 2 letters followed by 4 digits and nothing can repeat?

2 Answers By Expert Tutors The two letters can be chosen without repeating in 26*25 = 650 ways. There are 10 digits between 0 and 9. Any four can be selected without repeating in 10*9*8*7 = 5040 ways. The combination of a letters and 4 digits can be made in 650*5040 = 3,276,000 ways.

How many distinct passwords are there?

There are 10,000 possible combinations that the digits 0-9 can be arranged into to form a four-digit code. Berry analyzed those to find which are the least and most predictable.

How many characters can a password be?

Passwords should be a minimum of eight characters in length. Longer passwords are more secure and should contain upper and lower case characters, numbers, and special characters. This provides a character set of 95 possible characters.

How many characters are in a computer password?

Each user on a computer system has a password, which is six characters long, where each character is an uppercase letter or digit. Each password must contain at least one digit.

What is the number of passwords with 1 letter and 3 digits?

Thanks to the comment I received from Mr Alan Klette, I realized that I had not paid sufficient attention to the wording of the question. The correct answers are: Passwords with 1 letter and 3 digits: 26 (letters of the alphabet of the english language)*10^3 (three integers, each 0 to 9)=26000.

How many numbers are there in 26000 passwords?

The correct answers are: Passwords with 1 letter and 3 digits: 26 (letters of the alphabet of the english language)*10^3 (three integers, each 0 to 9)=26000. Passwords with 1 letter and 4 digits:26* (10^4)=260000. Passwords with 3 or 4 digits: 26000 + 260000=286000.

Do passwords need to be in combination caps?

Question asked but not practical. It used to be that passwords needed to be a combination caps, small letters, numerals and other characters that were not numerical or alpha. Nowadays, pass phrases are the rage such as ‘my f@v0r1te d0g is a Sh1b@ 1nu @geD 6.