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What is permutation? |
Answer» A permutation is defined as an arrangement in a definite order of a number of objects taken some or all at a time. Counting permutations are merely counting the number of ways in which some or all objects at a time are rearranged. The convenient expression to denote permutation is defined as “\xa0nPr\xa0”.The permutation formula is given by,\tPr\xa0= n!/(n-r)! ; 0\xa0≤ r ≤ n\t | |