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Igoryamba
3 years ago
8

In a certain country telephone numbers have 9 digits. the first two digits are the area code and are the same within a given are

a. the last 7 digits are the local number and cannot begin with a zero. how many different telephone numbers are possible within a given area code in this country?
Mathematics
1 answer:
irga5000 [103]3 years ago
6 0
<span>Using the counting principle, the total number of possible telephone numbers is given by N = 1 * 1 * 9 * 10 * 10 * 10 * 10 * 10 * 10 = 9,000,000</span>
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