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What is NCR in Maths

NCR is a formula used when the arrangement of a certain order has to be made without considering the order of things.

Answer: NCR is a formula of combination and arrangement, where the object’s order does not matter so much. Basically, the NCR formula is used when the arrangement of a certain order has to be made without considering the order of things. 

The Formula of NCR is:  nCr=n! / r!n-r!

Here, 

  • “n” stands for the total number of things and 
  • “r” stands for the things chosen out of the “n” number of things. 

For example, if we need to select 3 books from 5 books, it can be selected in various ways. 

So, possible ways would be :  nCr= 5! / 3!5-3!

= 5x4x3x2x1 / 3x2x1x2

= 10 ways.