SOLUTION: In a plan for area codes , the first digit could be any number from 0 through 6 , the second digit was either 1,4 or 7. With this plan how many different area codes are possible?
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Question 1004584: In a plan for area codes , the first digit could be any number from 0 through 6 , the second digit was either 1,4 or 7. With this plan how many different area codes are possible? Answer by fractalier(6550) (Show Source):
