[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: lynx-dev Options, V.Links, random

From: Doug Kaufman
Subject: Re: lynx-dev Options, V.Links, random
Date: Tue, 21 Dec 1999 00:29:21 -0800 (PST)

On Mon, 20 Dec 1999, Eduardo Chappa L. wrote (privately):

>   Thanks for your message. I learned all  this stuff about combinations a
> long time ago and I think about these problems in the same way as you do,
> except, maybe, at the end.

Thanks for being so gentle. It would have been just as easy to
say "You talked about combinations, but used the formula for
permutations." A fairly big goof, which changes the interpretation of
the results. The 20! makes the chance of being a unique combination
much higher, and the chance of duplication vanishingly small. I guess
it has been too many years since I worked with probability regularly.
The error would have been obvious to me a few years ago, without
anyone having to point it out.

Correct formula for chance of duplicate values (20 from pool of 10000)

1 - ( 9999! / (9980! * 10E76 * 20!))

It certainly is humbling to be so wrong in public. Thanks for not
letting the misinformation stand.
Doug Kaufman
Internet: address@hidden

reply via email to

[Prev in Thread] Current Thread [Next in Thread]