Discrete Structures or Discrete Mathematics If every telephone in the world is assigned a number that contains a country code 1 to 3 digits long, thatis, of the form X, XX, or XXX, followed by a 12-digit telephone number of the form NXXX-NXXX-XXXX. How many different telephone numbers would be available worldwide under this numberingplan?

The telephone number has a country code first, followed by 12 digit telephone number of the form…

Answered: If every telephone in the world is…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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If every telephone in the world is assigned a number that contains a country code 1 to 3 digits long, that is, of the form X, XX, or XXX, followed by a 12-digit telephone number of the form NXXX-NXXX- XXXX. How many different telephone numbers would be available worldwide under this numbering plan?