SOLUTION: How many seven-digit telephone numbers are possible if the first two digits cannot be ones or zeros

SOLUTION: How many seven-digit telephone numbers are possible if the first two digits cannot be ones or zeros

Algebra.Com

Question 1136088: How many seven-digit telephone numbers are possible if the first two digits cannot be ones or zeros
Answer by ikleyn(52778) (Show Source): You can put this solution on YOUR website!
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= 6400000.

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