How many different telephone numbers would be available

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Suppose that at some future time 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 10-digit telephone number of the form NXX-NXX-XXXX (as described in Example 8). How many different telephone numbers would be available worldwide under this numbering plan?

Reference no: EM131179046

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