My Math Forum  

Go Back   My Math Forum > College Math Forum > Advanced Statistics

Advanced Statistics Advanced Probability and Statistics Math Forum

LinkBack Thread Tools Display Modes
February 28th, 2012, 07:56 PM   #1
Joined: Sep 2009

Posts: 71
Thanks: 0

Probability and Expectation of Logical Propositions

Given seven propositions of the form in which the variables in each proposition are all different(although variables may be repeated throughout the other seven propositions) and may also be negated.

a. what is the probability that a single proposition is true?
my attempt:
A proposition is true if it has at least one true value. The number of propositions with at least one true = total true/false outcomes - number of propositions with no true values =
Pr[proposition is true] =

b. What is the expected number of true propositions
random variable denoting the number of True propositions
random variable indicating whether the proposition is 1: true or 0: false

Am I on the right track or am I completely wrong?
restin84 is offline  

  My Math Forum > College Math Forum > Advanced Statistics

expectation, logical, probability, propositions

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
probability-mathematical expectation helloprajna Math Books 0 November 18th, 2012 09:50 PM
probability:expectation problem schezleng Probability and Statistics 7 August 5th, 2011 06:56 PM
LOGICAL EQUIVALENCES beatdown123 Applied Math 1 September 8th, 2010 09:20 PM
expectation and Dice Probability Problem YUNGBuckeye23 Advanced Statistics 6 December 19th, 2009 03:20 PM
Logical Proof aoricky21 Number Theory 4 September 22nd, 2007 02:35 AM

Copyright © 2018 My Math Forum. All rights reserved.