Holi Offer - Use Code HOLI24

Register Now

Difference between Permutations and Combinations

Published on Saturday, March 01, 2014
Often students confuse between Permutations and Combinations. While both are used to find ways to do a specific job, in permutation order is important whereas in combinations, order is not important

Lets take a simple example 

Question - How many 4 color stripes flags can be made using six different colors. Repetition is not allowed.

There is a proper order and there are restrictions so we will use permutation.

nPr = n!/(n-r)! = 6!/(6-4)! = 6!/2! = 6*5*4**3 = 360

Question - How many 4 color stripes flags can be made using six different colors. Repetition is allowed.

As repetition is allowed and there is no proper and restrictions, we can use combinations here
nCr = n!/r(n-r)! = 6!/

If the order doesn't matter, it is a Combination. If the order does matter it is a Permutation.

I have made a detailed video on this topic, will upload soon on YouTube.

You can practice this chapter on Testpanda.com

Can I help you?

ramandeep singh

Hey I am Ramandeep Singh. I am determined to help students preparing for RBI, SEBI, NABARD and IBPS exams. Do you want me to help you ?

Join my class here
    Follow me:
Close Menu
Close Menu