Tuesday

September 16, 2014

September 16, 2014

Posted by **student** on Friday, July 13, 2007 at 7:47pm.

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 ten number possibilities in each of the three spaces of the area code and repeats are allowed, there are 10^3 (1000) possible permutations.

To distinguish combinations from permutations, see the following sources:

http://mathforum.org/dr.math/faq/faq.comb.perm.html

http://tutors4you.com/permutationcombinationtutorial.htm

http://en.wikipedia.org/wiki/Combinatorics

http://betterexplained.com/articles/easy-permutations-and-combinations/

I hope this helps. Thanks for asking.

**Answer this Question**

**Related Questions**

math ,correction - consider determining how many possible phone numbers are in ...

probability - you are to set up a code of consisting of three letters (A to Z) ...

Math - 1.) A security code has seven characters. Each code begins with two ...

Precalculus - 1. permutation or combination: how many schedules are possible if ...

math - Decide whether you would use a permutation, a combination, or neither. ...

math - a phone company wants to create some new area codes. each area code will ...

Math - To open the chest of shells the souvenir merchant must enter a code. As ...

maths permutation and combination - Your password for a given website is made up...

Math - a phone company wants to create some new area codes. Each new area code ...

Algebra - Decide whether you would use a permutation, a combination, or neither...