Discrete Math We want to build 13 letter “words" using only the first n = 9 letters of the alphabet. For example, if n = 5 wecan use the first 5 letters, {a, b, c, d, e} (Recall, words are just strings of letters, not necessarily actual Englishwords.)a. How many of these words are there total?b. How many of these words contain no repeated letters?c. How many of these words start with the sub-word “ade"?d. How many of these words either start with “ade" or end with "be" or both?e. How many of the words containing no repeats also do not contain the sub-word “bed"?

We can do this by formulas of discrete mathematics

Answered: We want to build 13 letter “words"…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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