SOLUTION: Telephone numbers in the US start with a 3 digit area code followed by a 7 digit local number. Assume that any number (0-9) is possible for each digit.
a) How many different ar
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a) How many different ar
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Question 878785: Telephone numbers in the US start with a 3 digit area code followed by a 7 digit local number. Assume that any number (0-9) is possible for each digit.
a) How many different area codes are possible?
b) What is the probability that an area code starts with a 5?
c) For a given area code, how many different local numbers are possible?
d) How many different complete telephone numbers are possible?
You can put this solution on YOUR website! Telephone numbers in the US start with a 3 digit area code followed by a 7 digit local number. Assume that any number (0-9) is possible for each digit.
a) How many different area codes are possible?
3 decimal digits. What do you think?
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b) What is the probability that an area code starts with a 5?
5 is 1 of 10 possibilities.
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c) For a given area code, how many different local numbers are possible?
7 decimal digits.
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d) How many different complete telephone numbers are possible?
10 decimal digits -->
