Level
pending

Consider a set of a large number of pairs of envelopes and letters. The \(n^{th}\) envelope and letter is denoted by \(E_{n}\) and \(L_{n}\) respectively and both of them have the number \(n\) printed on them.

All the letters have been taken out of the envelopes and now are arranged randomly.

Find the probability that the letter \(L_{n}\) does not go in envelope \(E_{n}\) \(\forall n \in \mathbb{N}\)

**Details and Assumptions:**

By a large number, I mean the total number of pairs approach infinity.

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