Question: the question ond digit was either 3 or 4, and the third digit could be any number in a different plan for area codes, the

the question

ond digit was either 3 or 4, and the third digit could be any number in a different plan for area codes, the first digit could be any number from 3 through 8, the sec: except 3 or 5. With this plan, how many different area codes are possible? There are | | possible area codes

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