Wednesday
September 3, 2014

Homework Help: Math

Posted by marco on Tuesday, March 1, 2011 at 10:27am.

Confused on permutation or combination on this question:

A VISA credit card has a first digit of 4 followed by 15 other digits. How many different VISA accounts does this allow?

I know the formulas but I am having a hard time determining which one to use. Help!!!

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