Permutation & Combination CalculatorPermutation & Combination Calculator is an online statistics tool programmed to calculate the nPr  Permutation and nCr  Combination of the n different items or symbols. The factorial is involved to perform both the ncr and npr calculations for a given N and R sample points of a data set PermutationsIn the context of counting problems, Permutations is the arrangements where the order is important and repetitions or recurrence is not allowed. The number of permutations of n distinct points taken r at a time is written as nPr. Because the number of objects is being arranged cannot exceed total number available. There are n! (n factorial) permutations of n symbols. A rpermutation of n symbols is a permutation of r of them. There are n!/(n  r)! different rpermutations of n symbols. A permutations represented by nPr and calculated from the formula CombinationsThe Combinations is a method of selecting several items or symbols out of a larger group or a data set, where an order does not matter. The Combination represented by nCr and calculated from the formula FactorialFactorials are used to compute permutations (nPr) and combinations (nCr). A factorial is the result of multiplying a given number of consecutive integers from 1 to the given number. It is written with the exclamation sign: n! and it is defined as

