Each user on a computer system has a password whichmust be six to eight characters long. • Each character is an uppercase letter or digit. • Each password must contain at least one digit. How many possible passwords are there?
Added by Richard W.
Close
Step 1
The password can be composed of uppercase letters (26 possibilities) and digits (10 possibilities). This gives us a total of 36 possible characters for each position in the password. Show more…
Show all steps
Your feedback will help us improve your experience
Maardava S and 75 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Each student has a password, which is SIX characters long. Each character is either a digit or a lowercase letter. Each password must contain at least TWO digits. How many possible passwords are there? Show your working.
T. L.
Passwords Suppose a password must have at least 8 characters, but no more than 12 characters, made up of letters (without distinction for case) and digits. If the password must contain at least one letter and at least one digit, how many passwords are possible?
Counting and Probability
Permutations and Combinations
Passwords Given the characters $A, B, C, H, I, T, U, V,$ $1,2,3,$ and $4,$ how many seven-character passwords can be made? (No repeats are allowed.) How many if you have to use all four numbers as the first four characters in the password?
Probability and Counting Rules
Counting Rules
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD