8. Prove that n m n n ("+")=(6)(*) + (*)(,~1) r r (*) (*) +---+ (c)(") r -

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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8. Prove that
n m
n
n
("+")=(6)(*) + (*)(,~1)
r
r
(*) (*) +---+
(c)(")
r
-
Transcribed Image Text:8. Prove that n m n n ("+")=(6)(*) + (*)(,~1) r r (*) (*) +---+ (c)(") r -
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