SOLUTION: How many strings of 4 lower case English letters are there that have the letter x in them somewhere? Here strings may use the same letter more than once. (Hint: It might be easier

Question 359487: How many strings of 4 lower case English letters are there that have the letter x in them somewhere? Here strings may use the same letter more than once. (Hint: It might be easier to first count the strings that don't have an x in them.)
I already know that there is overall a total of 456976 total possabilities if all letters can be used and repeated but i dont know where to go from there
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
25^4=390625 four letter words without an x.
26^4=456976 possible 4 letter words.
456976-390625=66,351 four letter words with an x.
.
Ed
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