A computer password consists of: • letters {a, A, 6, B,
...,2,Z}, • digits {0, 1,...,9),...
A computer password consists of: • letters {a, A, 6, B,
...,2,Z}, • digits {0, 1,...,9), or = 16 • special characters
{!,@,#,$,%}. In addition, a password must • contain at least one
upper case letter, • contain at least one special character. How
many passwords of length 8 are possible?
DISCRETE MATH.
If passwords contain letters(lower and upper case), numbers
(0-9) and can use these special...
DISCRETE MATH.
If passwords contain letters(lower and upper case), numbers
(0-9) and can use these special characters(!,@,#,$,%)
how many 8 character long passwords are possible?
One character has to be an uppercase and another one has to be a
special character.
1) Assume that a password can contain upper and lower-case
letters (26), digits, and special characters...
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?
The company has agreed on an 8 character password format,
comprised of upper case letters ,...
The company has agreed on an 8 character password format,
comprised of upper case letters , lower case letters, and digits
(0-9). Find the number of passwords possible where the first 2
characters have to be upper case letters, the next 5 can be lower
case letters or digits , and the last character has to be an upper
case letter. Here are the restrictions:
a. Repetitions are allowed
b. Repetitions are not allowed
An access code consists of 3 letters of the alphabet followed by
3 digits. (Digits are...
An access code consists of 3 letters of the alphabet followed by
3 digits. (Digits are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.) How many
different access codes are possible?
A computer system uses passwords that contain exactly 5
characters, and each character is 1 of...
A computer system uses passwords that contain exactly 5
characters, and each character is 1 of the 3 lowercase letters (a,
b, c) or 3 upper case letters (A, B, C) or the 5 odd digits (1, 3,
5, 7, 9).. Let Ω denote the set of all possible passwords, and let
A and B denote the events that consist of passwords with only
letters or only integers, respectively. Determine the number of
passwords for A′∩ B′. Report the exact...