Consider strings of length n over the set{a,b,c,d}. a. How
Chapter 9, Problem 9.105(choose chapter or problem)
Consider strings of length n over the set{a,b,c,d}. a. How many such strings contain at least one pair of adjacent characters that are the same? b. If a string of length ten over{a,b,c,d}is chosen at random, what is the probability that it contains at least one pair of adjacent characters that are the same?
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