How many strings are there of lowercase letters of length four or less, not counting the empty

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How many strings are there of lowercase letters of length four or less, not counting the empty string?

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Discrete Mathematics and Its Applications

ISBN: 978-0073383095

7th edition

Authors: Kenneth H. Rosen

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Question Posted: May 03, 2016 01:38 AM

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How many strings are there of lowercase letters of length four or less, not counting the empty

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By the sum rule we can count the number of strings of length 4 or less by countin...View the full answer

Discrete Mathematics and Its Applications

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