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Write a recursive methodcalledpermutationthataccepts two integersnandras parameters and returns the number of unique permutations ofritems from a...

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Programming

Write a recursive methodcalledpermutationthataccepts twointegersnandras parameters and returns the number of uniquepermutations ofritems from a group ofnitems. For given valuesofnandr, this valuepermutation(n,r)can be computed as follows:

permutation(n,r)= n!/ (n-r)!

hint: permutation(6, 4)should return360. It may be helpful tonote thatpermut(5, 3)returns60, or 360/6.

Answer & Explanation Solved by verified expert
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The recursive function to find permutation can be defined asfollowsint permutationint n int r ifr 1 return n stops recursion return npermutationn1    See Answer
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