avatar +14 

When making sets that do not include all the numbers that are possible (eg how many set of five can be made from eight dogs, or how many seven person sets can be made with nine people) when do you use nPr and when do you use nCr?

nkorigami May 17, 2017

2+0 Answers


Permutation: A set of objects in which position (or order) is 
Combination: A set of objects in which position (or order) is NOT 

Guest May 17, 2017
avatar +14 

Thank you!

nkorigami May 17, 2017

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.   See details