Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 13 - Counting and Probability - Chapter Review - Chapter Test - Page 869: 2

Answer

$3$

Work Step by Step

According to the picture: $n(\text{not Physics, not Biology, not Chemistry})=70-n(\text{Physics, Biology or Chemistry})=70-(22+4+9+8+2+7+15)=3.$
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