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Mathematics, 16.04.2020 17:51 Jasten

In a different plan for area codes, the first digit could be any number fromnbsp 2 throughnbsp 7, the second digit was eithernbsp 2 comma 3comma nbspornbsp 4, and the third digit could be any number exceptnbsp 4nbspnbsp or 8. With this plan, how many different area codes are possible?

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