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nCr

On a Casio calculator you can calculate a combination

nCr

The English lettering reads 'from n Choose r'.

 


Example 1

To calculate

  4C2                
6.   
 4  nCr  2  =

 


Example 2

To calculate

  0C0                
1.   
 0  nCr  0  =

 


Example 3

To determine how many different 4-member groups can be organized in a group of 10 individuals

  10C4               
210.   
 1   0  nCr  4  =

 


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