## Finite Math and Applied Calculus (6th Edition)

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