Discrete Mathematics with Applications 4th Edition

Published by Cengage Learning
ISBN 10: 0-49539-132-8
ISBN 13: 978-0-49539-132-6

Chapter 9 - Counting and Probability - Exercise Set 9.4 - Page 564: 28

Answer

Yes

Work Step by Step

Consider if the programmer does not ever write 30 or more lines of code in a day. Then, the maximum number of lines writable in the $17$ days is $29*17 = 493$. However, since $500$ lines were written, there must be a day in which the programmer wrote $30$ or more lines of code.
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