Changes

<div style="font-size:30px">'''COMBIN(N,R)'''</div><br/>

<div style="font-size:30px">'''COMBIN(N,R)'''</div><br/>

*'N' is the number of items.

*<math>N</math> is the number of items.

*'R' is the  number of items in each arrangement.  

*<math>R</math> is the  number of items in each arrangement.  

==Description==

==Description==

*This function gives the combination of N objects.  

*This function gives the combination of N objects.  

*i.e.An arrangement of R objects without any repetition,

*i.e. An arrangement of R objects without any repetition, selected from N different objects is called a combination of N objects taken R at a time.

*selected from N different objects is called a combination of N objects taken R at a time.

*Also if the order is not a matter, it is a Combination.  

*Also if the order doesn't a matter, it is a combination.  

*If order is a matter it is a Permutation.

*If order is the matter it is a permutation.

*A combination is denoted by nCr or <math>\binom{n}{r}</math>.  

*A combination is denoted by ncr or(n r).  

*A formula for the number of possible combinations of R objects from a set of N objects is <math>\binom{n}{r}=\frac{\fact{n}}{\frac{r}\frac{n-r}}(n  r)=n!/r!(n-r)!, where n!=1*2*3*...*n& r<=n.

*A formula for the number of possible combinations of R objects from a set of N objects is (n  r)=n!/r!(n-r)!, where n!=1*2*3*...*n& r<=n.

*This function will give the result is Error when

*This function will give the result is Error when

*1.The N&R are non numeric

*1.The N&R are non numeric