tramtran111 said:i got the answer! you just simply multiply these number 26 . 25. 5.4.3 =39000
Avodyne said:(I'm assuming that the letters and digits can appear in any order; the problem could be read as saying that a password is 2 letters followed by 3 digits.)
tramtran111 said:i got the answer! you just simply multiply these number 26 . 25. 5.4.3 =39000
A bit of both.fionadlegend said:Passwords are made up of 2 alphabetic letters and 3 digits from the digits 3,4,5,6,7. How many passwords are there with no letter or digit being repeated?
Homework Equations
im confused as to whether its a combination or a premutation
Avodyne said:(I'm assuming that the letters and digits can appear in any order; the problem could be read as saying that a password is 2 letters followed by 3 digits.)
Shooting Star said:Your two sentences above contradict each other. Why should the problem could be read as you say? Any letter or number can sit anywhere, which you said in the first sentence.
HallsofIvy said:I believe it would be clearer if he had included a word "but"
"I'm assuming that the letters and digits can appear in any order; but the problem could be read as saying that a password is 2 letters followed by 3 digits."
HallsofIvy said:I agree with you. But posters here don't always copy the problem correctly and having "alphabet first, then digits" is common enough that it would be reasonable to at least note it.
There are 260,000 possible combinations for a password with 2 alphabetic characters and 3 digits. This is calculated by taking the number of possible alphabetic characters (26) and multiplying it by the number of possible digits (10) raised to the power of the number of digits (3).
While there are a large number of possible combinations for this type of password, it may not be considered completely secure. Brute force attacks and dictionary attacks can still potentially crack these passwords. It is recommended to use a combination of letters, numbers, and special characters for a more secure password.
One advantage of using 2 alphabetic characters and 3 digits in a password is that it can be easier to remember than a long string of random characters. It also adds an extra layer of complexity compared to a password with only letters or numbers.
It is not recommended to use the same password combination for multiple accounts. If one account is compromised, it can make it easier for hackers to access other accounts with the same password.
It is generally recommended to change your password every 3-6 months for added security. However, if you suspect that your password has been compromised, it is important to change it immediately.