SOLUTION: Phone numbers in the U.S. consists of 10 digits, a 3-digit area code and a 7-digit local number. How many different telephone numbers are possible within each area code, assuming t
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Question 1156738: Phone numbers in the U.S. consists of 10 digits, a 3-digit area code and a 7-digit local number. How many different telephone numbers are possible within each area code, assuming that the local number cannot begin with 0 or 1? Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! Phone numbers in the U.S. consists of 10 digits, a 3-digit area code and a 7-digit local number. How many different telephone numbers are possible within each area code, assuming that the local number cannot begin with 0 or 1?
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7 digits.
The 1st digit is 1 of 8.
The other 6 are 1 of 10.
