SOLUTION: Consider the strings that consist of four lowercase letters and have the letter z in them. How many such strings are there? Assume we are using the English alphabet. I think so

Algebra ->  Permutations -> SOLUTION: Consider the strings that consist of four lowercase letters and have the letter z in them. How many such strings are there? Assume we are using the English alphabet. I think so      Log On


   

Question 907466: Consider the strings that consist of four lowercase letters and have the letter z in
them. How many such strings are there? Assume we are using the English alphabet.
I think solution is 26^4-25^4
is this right anwser ?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
z***
*z**
**z*
***z
Can the * be another z? If so there are 26 possible choices.
If not then there are 25 possible choices.
N=1%2A26%2A26%2A26%2B26%2A1%2A26%2A26%2B26%2A26%2A1%2A26%2B26%2A26%2A26%2A1
N=4%2A26%2A26%2A26
or
N=1%2A25%2A25%2A25%2B25%2A1%2A25%2A25%2B25%2A25%2A1%2A25%2B25%2A25%2A25%2A1
N=4%2A25%2A25%2A25