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Let A be a subset of the set {1,2,...,n}. The number of elements of A is r, 1<=r<=n (|A| = r). What is the probability that A does not contain any consecutive elements?

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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Let A be a subset of the set {1,2,...,n}. The number of elements of A is r, 1<=r<=n (|A| = r). What is the probability that A does not contain any consecutive elements?

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Let A be a subset of the set $\{1, 2, . . . n\}$ . The number of elements of A is r, $1 \leq r \leq n [|A| = r]$ .

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