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: 12

Answer

$27$ cards

Work Step by Step

There are $26$ of each red and black cards in the deck. In the worst case scenario, you pick all the black cards first, meaning the first $26$ cards are black. This means the $27$th card is red. The number cannot be any higher than this, as there are 26 cards, so this is the maximal number of red cards drawn, so $27$ is the answer.
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