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Mathematics, 22.01.2020 23:31 milamdaniela

In a different plan for area codes the first digit could be any nbet 1 through 6 the second digit was either 5 6 7 and 8 and the third could be any nbet except 5 how many different area codes are possible

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In a different plan for area codes the first digit could be any nbet 1 through 6 the second digit wa...
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