A company wants to have 8-digit phone extensions with the first digit not being 0. How many different extensions are possible?
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A company wants to have 8-digit phone extensions with the first digit not being 0. How many different extensions are possible?
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DeloresApril 10, 2023 в 05:32
There are 9 options (1 through 9) for the first digit, and 10 options (0 through 9) for each of the remaining 7 digits. Therefore, the total number of possible extensions is:
9 x 10 x 10 x 10 x 10 x 10 x 10 x 10 = 9,000,000
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