Course Solutions Uncategorized (Solved) : 1 Dictionary Used Solving Substitution Ciphers 5475 Five Letter Words 174 First Letter E 7 Q34314103 . . . .

(Solved) : 1 Dictionary Used Solving Substitution Ciphers 5475 Five Letter Words 174 First Letter E 7 Q34314103 . . . .

 

1. In a dictionary used for solving substitution ciphers, there are 5475 five- letter words. Of these, 174 have first letter E and 766 have last letter Y Seventeen words have first letter E and last letter Y. You are trying to guess the plaintext word for a five letter ciphertext word. Assume the plaintext word is in the dictionary. Assume that all words in the dictionary are equally likely to be the one you are trying to guess. Write your answers as fractions in lowest terms, like 87/218. a. What is the probability that the first letter of 

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