Answer
35 ways
Work Step by Step
Ways to select r unordered elements from a set with n elements with repetition is given by C(n+r-1,r)
In our case r= 3 , n= 5
So C(5+3-1,3) = C(7,3) = 35 ways
Discrete Mathematics and Its Applications, Seventh Edition
by Rosen, Kenneth
Published by
McGraw-Hill Education
ISBN 10:
0073383090
ISBN 13:
978-0-07338-309-5
Chapter 6 - Section 6.5 - Generalized Permutations and Combinations - Exercises - Page 432: 7
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