Until​ recently, all area codes had a 0 or a 1 as the middle digit and the first digit could not be 0 or 1. Complete parts​ (a) and​ (b) below. Question content area bottom   Part B The current 5​-digit sequence will permit how many telephone 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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Until​ recently, all area codes had a 0 or a 1 as the middle digit and the first digit could not be 0 or 1. Complete parts​ (a) and​ (b) below.
Question content area bottom
 
Part B
The current 5​-digit sequence will permit how many telephone numbers.
 
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