A man with n keys wants to open his door he tries the keys


A man with n keys wants to open his door. He tries the keys independently and at random. Let Nn be the number of trials required to open the door. Find E[Nn] and Var [Nn] if (i) unsuccessful keys are not eliminated from further selections, (ii) if they are, Assume that exactly one of the keys can open the door.

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Basic Statistics: A man with n keys wants to open his door he tries the keys
Reference No:- TGS02630084

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