SOLUTION: A few years ago Portland instituted a new area code of 971 so that more phone numbers could be assigned. How many seven-digit phone numbers can be formed using this area code if th
Question 91359: A few years ago Portland instituted a new area code of 971 so that more phone numbers could be assigned. How many seven-digit phone numbers can be formed using this area code if the only restriction is that the first number cannot be 0 or 1? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! How many seven-digit phone numbers can be formed using this area code if the only restriction is that the first number cannot be 0 or 1?
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8 ways to pick the 1st digit
10 ways to pick each of the remaining 6 digits.
Answer: 8*10^6 = 8 million
Cheers,
Stan H.
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