Difference between revisions of "Manuals/calci/COMBIN"
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==Description== | ==Description== | ||
| − | + | This function gives the combination of N objects. | |
| − | + | 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. | |
| − | + | Also if the order doesn't a matter, it is a combination. | |
| − | + | If order is the matter it is a permutation. | |
| − | + | A combination is dnoted by ncr or(n r). | |
| − | + | 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 | |
1. The N&R are non numeric | 1. The N&R are non numeric | ||
2. The N&R<0 or N<R | 2. The N&R<0 or N<R | ||
| − | + | When we are giving the N&R values in decimals ,it will convert in to Integers. | |
| − | * | + | *COMBIN(5.4,2)=10 is equivalent to COMBIN(5,2) |
| − | * | + | *COMBIN(5,-2)=NAN, because R is negative. |
==Examples== | ==Examples== | ||
Revision as of 05:43, 12 November 2013
COMBIN(n,r)
- 'N' is the number of items.
- 'R' is the number of items in each arrangement.
Description
This function gives the combination of N objects. 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. Also if the order doesn't a matter, it is a combination. If order is the matter it is a permutation. A combination is dnoted by ncr or(n r). 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 1. The N&R are non numeric 2. The N&R<0 or N<R When we are giving the N&R values in decimals ,it will convert in to Integers.
- COMBIN(5.4,2)=10 is equivalent to COMBIN(5,2)
- COMBIN(5,-2)=NAN, because R is negative.
Examples
| CHIDIST(x,df) | x | df | RESULT |
|---|---|---|---|
| CHIDIST(18,2) | 18 | 2 | 0.0001234098 |
| CHIDIST(15,1) | 15 | 1 | 0.0001075112 |
| CHIDIST(2,1) | 2 | 1 | 0.157299207050 |
| CHIDIST(-2,1) | (-)2 | 1 | error |
| CHIDIST(2,-1) | 2 | (-)1 | error |