Hence , Formula for permutation and combination is
[tex]P(n,r)=\frac{n!}{n-r!}[/tex]
No of ways in which we can obtain possible no. of ways in which particular arrangement can be made.
The way in which we can select item as per given situation
[tex]P(n,r)=\frac{n!}{n-r!}[/tex]
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