how do you distinguish between permutation and combination
Say you have 3 objects A,B, and C
All the combinations of 2 are AB,AC, and BC there are no others There are 3 combinations of 2 objects
The order that the objects are selected in is NOT important.
All the permutations of 2 are AB, BA, AC, CA, BC, and CB There are 6 pemutations of 2 objects
You see, with permutations the order is important!
Let me add one thing to what Melody said.....
Combinations count sets
Permutations count orderings within the sets
Thus, with sets of more than one element.....the number of permutations will be larger than the number of combinations....!!!