jgnjanjdknsjrr9986 jgnjanjdknsjrr9986

06-05-2018
Mathematics

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A certain country's postal service currently uses 6-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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sqdancefan sqdancefan

06-05-2018

If any digit can be 0 to 9 with no restrictions, the number of possible zip codes is ...
10×10×10×10×10×10 = 10⁶ = 1,000,000.

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