19 octahedra (like dice, but having 8 faces rather than 6) are rolled. What is the probability of getting exactly four 8’s and four 7’s?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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19 octahedra (like dice, but having 8 faces rather than 6) are rolled. What is the probability of getting exactly four 8’s and four 7’s?

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