SOLUTION: How many seven-digit phone numbers can be formed if the digit cannot be 0 or 1?

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Question 959421: How many seven-digit phone numbers can be formed if the digit cannot be 0 or 1?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How many seven-digit phone numbers can be formed if the digit cannot be 0 or 1?
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If "the digit" is all 7, --> 8^7 numbers.