 My Math Forum Is This A Statement About Probability That Is Always True?

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 June 7th, 2018, 03:33 PM #1 Senior Member   Joined: Oct 2013 From: New York, USA Posts: 675 Thanks: 88 Is This A Statement About Probability That Is Always True? If there are x trials, the same x possibilities for each trial, and the probability of each outcome on each trial is 1/x, what is the probability that x trials will have each outcome happen once. Am I correct in saying that it is x!/(x^x). It works for two coins, where the probability of one head and one tail is 0.5. 2!/(2^2) = 1/2. Can it be expanded to a general formula for x*y trials having each outcome y times? My first formula would be for y = 1. June 7th, 2018, 04:20 PM #2 Senior Member   Joined: Sep 2015 From: USA Posts: 2,639 Thanks: 1475 looks right to me. Tags probability, statement, true Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post Lalitha183 Real Analysis 5 March 17th, 2018 02:19 AM danielphillis Applied Math 2 March 9th, 2014 07:06 PM frankpupu Linear Algebra 0 May 15th, 2012 01:35 PM Lucida Algebra 10 March 26th, 2012 05:16 PM maximus101 Linear Algebra 3 February 22nd, 2011 06:12 AM

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