math ,correction
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math ,correction
Is this correct? consider determining how many possible phone numbers are in an area code (repeated numbers allowed) Is this a combination, a permutation, or neither? I think it would be a combination wouldn't it? Since there are
asked by student on July 13, 2007 
Math
The telephone company wants to know how many different phone numbers are available for one area code. the only restrictions are on the prefixes, you can't start with a zero and you can't use 411, 611, 811, 911, or 555. how many
asked by Kim on January 6, 2016 
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In the state of Georgia, telephone numbers consists of 10 digits, including the area code. One of these area codes is 770. The first digit following the area code cannot be 1 or 0. Find the number of possibilities for telephone
asked by Anonymous on July 22, 2016 
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The Gallup Poll uses a procedure called random digit dialing, which creates phone numbers based on a list of all area codes in America in conjunction with the associated number of residential households in each area code. Give a
asked by wendy on January 10, 2017 
probability
you are to set up a code of consisting of three letters (A to Z) and five numbers (0 to 9). a) how many codes are possible if the letters and numbers can be repeated? b) how many codes are possible if each letter and digit can be
asked by sha on July 27, 2010

statistic & probability
How many 5 digit numbers can be formed using the digits 0, 1, 2, 3, 4, 5, 6 if repeition are not allowed. do i use 7P5? since i am choosing 5 numbers from 7 and they can't be repeated?
asked by Anonymous on June 14, 2012 
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1.) A security code has seven characters. Each code begins with two digits, then two letters, and finally three digits. the number of distinct security codes possible if repetition is allowed? 2.) How many ten digit phone numbers
asked by Emily on July 16, 2012 
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To open the chest of shells the souvenir merchant must enter a code. As his memory is poor, to remember the code he has filled in this speech bubble so that every statement is correct. What is the code? ? X number 1, ? X number 2,
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a phone company wants to create some new area codes. each area code will be 3 numbers . using the digits 1,5,and 7 only once in each code, how many codes can the phone company create?
asked by joe on November 3, 2011 
Math
a phone company wants to create some new area codes. Each new area code will have 3 numbers. Using the digits 1, 5, and 7 only once in each code, how many new codes can the phone company create?
asked by Leslie on August 31, 2011