difference between permutations and combinations

Asked by namaina2005 | 3rd Dec, 2009, 06:48: PM

Expert Answer:

Permutations are arrangment of r things out of n, sequentially.

If we take three letters a, b, c, the various arragements of them are abc, acb, bca, bac, cab, cba.

Hence we have 6 permutations.

But in combinations the order doesn't matter as long as it's the same thing.

For example, abc,  acb, bca, bac, cab, cba are all the same. And we have only one combination while 6 different permutation.




Answered by  | 3rd Dec, 2009, 07:20: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.