Finite Math and Applied Calculus (6th Edition)

Published by Brooks Cole
ISBN 10: 1133607705
ISBN 13: 978-1-13360-770-0

Chapter 6 - Section 6.2 - Cardinality - Exercises: 49

Answer

n($ P^{\prime}\cup$N )=80 (number of of stocks that are either not pharmaceutical or have not changed in value)

Work Step by Step

$ P^{\prime}\cup$N is the set of stocks that are either not pharmaceutical or have not changed in value. Cardinality of union: n($ P^{\prime}\cup$N )= n($P^{\prime}$) +n(N) -n($ P^{\prime}\cap$N) n($P^{\prime}$)=n(S)-n(P)= 100 - 50 = 50 n(N)= 40 n ($ P^{\prime}\cap$N)= 0+10 (in row N, all that are not P) n($ P^{\prime}\cup$N )=50+40-10=80 n($ P^{\prime}\cup$N )=80
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