X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Received: from [68.202.132.19] (account marv@lancaironline.net) by logan.com (CommuniGate Pro WEBUSER 5.1.3) with HTTP id 1693681 for lml@lancaironline.net; Wed, 20 Dec 2006 04:20:10 -0500 From: "Marvin Kaye" Subject: Re: [LML] Re: electric attitude indicators To: lml X-Mailer: CommuniGate Pro WebUser v5.1.3 Date: Wed, 20 Dec 2006 04:20:10 -0500 Message-ID: In-Reply-To: <4588D76B.6080307@tele2.it> References: <4588D76B.6080307@tele2.it> MIME-Version: 1.0 Content-Type: text/plain;charset="iso-8859-1";format="flowed" Content-Transfer-Encoding: 8bit Posted for "John F. Herminghaus" : If the success rate is 99.1% for both items, the probability that both will work is .991 X .991 or 98.2%. To put it in more understandable terms, if the failure rate for each of two objects is 33%, it is obvious that the failure rate of the assembly is not 10,9%. "Chatfield S. Daniel" wrote: """ """ If we assume that the Chelton has a failure rate of much less than 1% and the TruTrak ADI has a failure rate of much less than 1%, then the probability that they will both fail is much, much, much less than 1%. """ Mathematically it is actually 1% X 1% which is .01% Chat Daniel """