If r numbers are selected at random from the ten numbers1, 2, 3, ..., 10, repetitions being allowed, show the probability that theproduct of the numbers is of the form 3n –1 or 3n + 1 (n being a non-nega-tive integer) is (7/10).

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Answered: If r numbers are selected at random…

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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If r numbers are selected at random from the ten numbers 1, 2, 3,..., 10, repetitions being allowed, show the probability that the product of the numbers is of the form 3n –1 or 3n + 1 (n being a non-nega- tive integer) is (7/10).