A+-+Permutations+and+Combinations


 * __Concept A : Permutations and Combinations__**
 * A.1** To apply the fundamental counting principles to determine the number of possibilities that exist in a given situation.


 * A.2** To determine the number of permutations of n objects. (nPn = n!)


 * A.3** To determine the number of permutations of n different objects, taken r at a time. (nPr)


 * A.4** To determine the number of permutations of n objects, not all different.


 * A.5** To determine the number of permutations of n objects arranged in a circle.


 * A.6** To determine the number of combinations of n objects, taken r at a time.


 * A.7** To determine the number of combinations formed from more than one subset.