Question

How many passwords of 5 characters can be made if each password must start with two digits and end with three letters. The digits will be with replacement and the letters will be without replacement.

Answer #1

A computer password can be 5 - 6 characters. The password must
contain at least 1 digit. All other characters must either be
digits or lower case letters. How many unique passwords exists?

A computer password consists of six characters.
36a. How many different passwords are possible if each character
may be any lowercase letter or digit, and at least one character
must be a digit? Please enter your result in scientific notation,
making sure the answer in the left box is between 1 and 10.
36b. A computer system requires that passwords contain at least
one digit. If six characters are generated at random, and each is
equally likely to be any...

A computer password must be eight characters long. How many
passwords are possible if only the 26 letters of the alphabet are
allowed?
Assuming that repetitions of alphabets is possible to create
the password then the number of passwords possible
Assuming that repetitions of alphabets is not possible to
create the password then the number of passwords possible
A jar contains 4 red marbles numbered 1 to 4 and 10 blue
marbles numbered 1 to 10. A marble is drawn...

A computer password is required to be 6 characters long. How
many passwords are possible if the password requires 1 letter(s)
followed by 5 digits (numbers 0-9), where no repetition of any
letter or digit is allowed?
There are possible passwords.

1) Assume that a password can contain upper and lower-case
letters (26), digits, and special characters from the set { !, #,
$, %, &, * }. Furthermore, each password must start with a
letter and must contain at least one digit and one special
character. How many different six-character passwords can be formed
according to this specification?

Suppose you must create a password that consists of six
characters where the first two characters are numbers and the
remaining characters can be any numbers and any letters
(case-sensitive). How many such passwords are possible?

a password must be 4 characters long and contain only digits and
lowercase english letters. The english alphabet contains 5 vowels.
Assuming that digits and letters can be repeated how many differnt
passwords contain exactly one vowel?
enter the exact numeric number

The AccessPlus system at ISU has the following policy for
creating a password:
-Passwords must be exactly 8 characters in length.
-Passwords must include at least one letter (a-z, A-Z) or
supported special character (@, #, $ only).
-All letters are case-sensitive.
-Passwords must include at least one number (0-9).
-Passwords cannot contain spaces or unsupported special
characters.
According to this policy, how many possible AccessPlus passwords
are available? (Round to the nearest
trillion)

A computer system uses passwords that are exactly eight
characters and each character is one of the 26 letters (a-z) or
integers (0-9). Uppercases are not allowed).
How many passwords are possible?
If one selected a random password, what is the probability it
consists of five letters followed by 3 numbers?
What is the probability that a randomly selected password
consists exactly of 7 letters and 1 number?

Suppose that a certain computer password is allowed to be from 8
to 12 characters long, and may contain only lowercase letters (a to
z), uppercase letters (A to Z), and numbers (0 to 9).
1. How many such passwords are possible?
2. How many such passwords are possible if you cannot repeat
characters?
3. How many such passwords are possible if you cannot repeat
characters, and you must include
at least one number?

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