#2 - Permutation and Combination | Placement Paper Problems| IT Placement | Aptitude |
Formulas:
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Permutation = nPr = n!/(n-r)!
Combination = nCr = nPr/r!
where, n, r are non negative integers and r≤n.
r is the size of each permutation.
n is the size of the set from which elements are permuted.
! is the factorial operator.
Permutation and combination are pivotal topics in aptitude tests for IT placements because they test a candidate's ability to approach problems logically and systematically. These concepts are fundamental for solving a wide range of problems, from algorithm design to data analysis. Mastery of permutations and combinations helps in developing strong analytical skills necessary for coding, optimizing algorithms, and managing complex data structures. As IT companies often include these topics in their placement exams and interviews, a solid understanding of permutations and combinations significantly enhances a candidate's chances of success.
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