Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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Question
In a certain country, area codes have
three
digits and are subject to the following restrictions. The first digit cannot be
0 or 1;
the second digit can only be
0, 1, or 2;
and there are no restrictions on the
third
digit.
How many different area codes are possible?Express the number of area codes as a product.
Total number of area codes = nothing
(Do not multiply.)
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