3.52. How many telephone mobile numbers are composed of nine digits such that: (c) each successive digit of this number is 1 less than the preceding digit (d) the first, third, fifth, seventh and ninth digits are the same and are odd numbers, while the remaining digits are different even numbers?

3.52. How many telephone mobile numbers are composed of nine digits such that: (c) each successive digit of this number is 1 less than the preceding digit (d) the first, third, fifth, seventh and ninth digits are the same and are odd numbers, while the remaining digits are different even numbers?

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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Question

3.52. How many telephone mobile numbers are composed of nine digits such that:

(c) each successive digit of this number is 1 less than the preceding digit
(d) the first, third, fifth, seventh and ninth digits are the same and are odd numbers, while the remaining digits are different even numbers?

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