Respuesta :
There are 358,800 different ways that a 4-letter password might be used.
Explain the term permutation?
- The number of possible arrangements for a given set is calculated mathematically, and this process is known as permutation.
For the stated question-
- To make a four-letter password with no repeating letters and just lowercase letters;
- Every letter from A -Z (or 26) can be used as the initial letter for the computer account.
- Apart from the first letter again for second letter, we can select any letter between A and Z.
- Whatever letter from A to Z is available for selection, with the exception of the first and second letters again for third letter.
For the fourth letter, we might select any letter between A and Z besides the first, second, and third letters.
SO;
Number of possible combinations for 4-letter passwords
= 26 × 25 × 24 × 23
= 358,800
Thus, there are 358,800 different ways that a 4-letter password might be used.
To know more about the permutation, here
https://brainly.com/question/1216161
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The complete question is-
To log on to a certain computer account, the user must type in a 4-letter password. In such a password, no letter may be repeated, and only the lower case of a letter may be used. How many such 4-letter passwords are possible.
