SOLUTION: The telephone company is adding two new exchanges to its service area. The seven-digit telephone numbers for these new exchanges must begin with either a 5 or a 6. How many numbers

Question 1050949: The telephone company is adding two new exchanges to its service area. The seven-digit telephone numbers for these new exchanges must begin with either a 5 or a 6. How many numbers are available to the telephone company for the new exchanges?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
choices for 1st digit
The remaining digits have
through available
The total number of exchanges are:

200.000
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