Problem #PRU-5061

Problems Discrete Mathematics Combinatorics

Problem

Consider a set of numbers ${1, 2, 3, 4, . . . n}$ for natural $n$ . Find the number of permutations of this set, namely the number of possible sequences $(a_{1}, a_{2}, . . . a_{n})$ where $a_{i}$ are different numbers from $1$ to $n$ .

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