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A certain​ country's postal service currently uses 5​-digit zip codes in most areas. How many zip...

A certain​ country's postal service currently uses 5​-digit zip codes in most areas. How many zip codes are possible if there are no restrictions on the digits​ used? How many would be possible if the first number could not be 0​?

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Answer #1

TOPIC:Permutation and Combination.

i we knaw, there are total to pomible ditits viz, o, t2, on thase 5 places o th eve place and hence the totel o. o posurblo.

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