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From: fremont@hplabs.UUCP (Michael J. Fremont)
Newsgroups: net.math,net.misc
Subject: Re: A Different Simple Statistics Problem
Message-ID: <1777@hplabs.UUCP>
Date: Fri, 26-Aug-83 10:59:04 EDT
Article-I.D.: hplabs.1777
Posted: Fri Aug 26 10:59:04 1983
Date-Received: Mon, 29-Aug-83 02:36:08 EDT
References: <313@ihuxe.UUCP>
Organization: Hewlett Packard Labs, Palo Alto CA
Lines: 6

The probability of getting EXACTLY three correct envelopes is ZERO,
because if you got three right, there is only one envelope to put
the last letter in, and that is ALSO the right envelope -> you got 4
right.
mike