How to Calculate Combinations ?

How to Calculate Combinations ?

Important Note :  To calculate combinations,

  • First you should calculate all the equivalent permutations. 
  • Later you should correct this list by cutting out duplicates / repetitions.

 Now lets have a look at the mathematical formula for Combinations..

nCr = n! = n(n – 1)(n – 2) … … r .
(r!)(nr!) r!

n above case n is 4 and is 3, so

nCr    = C(n,r) = 4

That’s all for now friends. In our next post we shall discuss some practice problems on Permutations and Combinations.

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