Answer
$3$
Work Step by Step
Choosing three tech stocks out of the 3 declined tech stocks: $C(3,3)=1$ choices.
Choosing two non-tech stocks out of the 3 that declined : $C(3,2)=3$ choices.
Therefore there are $1*3=3$ such collesctions
Finite Math and Applied Calculus (6th Edition)
by Waner, Stefan; Costenoble, Steven
Published by
Brooks Cole
ISBN 10:
1133607705
ISBN 13:
978-1-13360-770-0
Chapter 6 - Section 6.4 - Permutations and Combinations - Exercises - Page 438: 63b
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