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Area codes are the first three digits of a 10-digit telephone number. The first digit of an area code cannot be 0 or 1. a. How many area codes can be created if digits are allow…

Area codes are the first three digits of a 10-digit telephone number. The first digit of an area code cannot be 0 or 1. a. How many area codes can be created if digits are allow…
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Area codes are the first three digits of a 10-digit telephone number. The first digit of an area code cannot be 0 or 1.

a. How many area codes can be created if digits are allowed to be repeated?

b. How many area codes can be created if digits are not allowed to be repeated?

asked
User Ara Hakobyan
by
8.3k points

1 Answer

4 votes

Answer:A

Step-by-step explanation:because the numbers can be allowed to be repeated

answered
User Szczepanpp
by
7.5k points
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