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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?

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?

Advanced Engineering Mathematics
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?
Transcribed Image Text: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?
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