How many strings of 4 lowercase letters have the letter x in them?

preprekomW

preprekomW

Answered question

2020-12-30

How many strings of 4 lowercase letters have the letter x in them?

Answer & Explanation

Brighton

Brighton

Skilled2020-12-31Added 103 answers

There are 26 letters, so the total number of strings of 4 lowercase letters is
264=456,975
(in each of the four places, we can put any of the 26 letters).
On the other hand, the number of strings of 4 lowercase letters that do not have the letter x in them is
254=390,625
(in each of the four places, we can put any of the 25 letters, since we are excluding x).
Finally, the difference of these numbers is the number of strings of 4 lowercase letters that have the letter x in them:
264254456.975390,625=66,350

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