Fri May 06, 2011 By: Neyhal Menghani
i am actually not able to understand , 
for ex, in the example which i am giving below, 
what is the role of C? i mean what do we do with C , 4 and 0, do we add these or

binomial coefficients

Expert Reply
Thu May 05, 2011
C stands for combination and P stands permutation
Now in case of permutation pnr = n!/(n-r)!
and in the case of combination Cnr =n!/r!(n-r)!
In case of C4o=4!/0!(4-0)!=4!/1*4!=4!/4!=1   (where 0!=1)
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