three letters of the English alphabet are selected at random, what is the probability of getting at least one letter x? (Letters can be used more once.)

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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If three letters of the English alphabet are selected at random, what is the probability of
getting at least one letter x? (Letters can be used more once.)

Expert Solution
Step 1: Given:

the total number of possible outcomes when selecting 3 letters at random with replacement is 26 cubed

so, Total possible outcomes equals 17576

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