Permutation & Combination

Permutation?

Number of different ways that a certain number of objects can be ARRANGED in order from a large of objects

•          Order matter, an ordered list.
•         Keyword(S): arrangement(s)

Combination?

Number of different ways that a certain number of objects as a group can be SELECTED from a larger number of objects.

• Order does not matter, as unordered group/list.
• Keywords: choice, selection, election.

Note: 0! = 1. there is no zero in factorial function

MathsIsFun.(2014) combinatorics: combinations-permutations. Retrieved from https://www.mathsisfun.com/combinatorics/combinations-permutations.html

Retrieved from Sir Habir, Lecturer of Cosmopolitan College of Commerce & Technology. (2016), Permutation & combination.