(a)
To calculate how many phone numbers would be possible in the area code if there are no restrictions.
(a)
Answer to Problem 8.69RE
There are
Explanation of Solution
Use the multiple counting principle and that there are ten digits:
There is no restrictions,
There are
(b)
To calculate how many phone numbers are there in the given area code if there is restrictions that exchanges does not begin with
(b)
Answer to Problem 8.69RE
There are
Explanation of Solution
Use the multiple counting principle and that there are ten digits:
There are restriction that exchanges does not begin with
There are
(c)
To calculate how many possible phone numbers in (b) include at least one
(c)
Answer to Problem 8.69RE
There are
Explanation of Solution
The total phone numbers are
The phone numbers that will not include
Therefore the possible phone numbers that will include at least one
Chapter 8 Solutions
Statistics Through Applications
Additional Math Textbook Solutions
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