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How many phone numbers are possible for one area code if the first four numbers are 202-1 in that order and the last three numbers are 1-7-8 in any order?
Wiki User
∙ 11y ago
With the constraints you have listed, there are only 6 possible phone numbers:
- 202-1178
- 202-1187
- 202-1718
- 202-1781
- 202-1817
- 202-1871
The first four digits are fixed, and there are six possible permutations of three different digits.
Wiki User
∙ 11y ago
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