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Possible phone-number combinations

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Reference no: EM131880505

In some countries, phone numbers consist of an area code made up of two digits and a local number made up of seven digits. Below are the requirements for 9-digit number:

  1. The area code can be made up of any digit other than 9
  2. The first digit of the local number cannot be 0
  3. Digits 2 - 7 can be any number.

Given the requirements above, how many possible phone-number combinations can these countries have?

Reference no: EM131880505

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