
Probability and Statistics Basic Probability and Statistics Math Forum 
 LinkBack  Thread Tools  Display Modes 
July 3rd, 2011, 01:01 PM  #1 
Newbie Joined: Jun 2011 Posts: 9 Thanks: 0  Probability Question
If Pr[E] = 1/4 and Pr[F] = 1/5 If it is known that when event F occurs, event E is 3 times more likely to occur than not to occur, find Pr[Fc  Ec]. Do we have to show that event E is 3 times likely to occur than not to occur even though when we are finding Pr[Fc  Ec] and event F doesn't occur? Also how do we go about solving this question? Thanks! 
July 3rd, 2011, 01:35 PM  #2 
Newbie Joined: Jun 2011 Posts: 9 Thanks: 0  Re: Probability Question
Also if two events are mutually exclusive, is it possible for neither of them to occur? I know that they both can't occur at the same time. Once again, thanks! 
July 3rd, 2011, 03:10 PM  #3  
Senior Member Joined: Feb 2010 Posts: 706 Thanks: 141  Re: Probability Question Quote:
 
July 3rd, 2011, 06:56 PM  #4  
Senior Member Joined: Apr 2011 From: USA Posts: 782 Thanks: 1  Re: Probability Question
I went about this a completely different way, but got the same answer. So to answer your other questions: Quote:
Quote:
 
July 4th, 2011, 05:47 AM  #5 
Newbie Joined: Jun 2011 Posts: 9 Thanks: 0  Re: Probability Question
Thank you so much mrtwhs and Erimess! This really helped me understand these type of probability questions and I was able to solve the rest of them fairly easily by understanding how you guys approached it.


Tags 
probability, question 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Probability Question  jskrzy  Probability and Statistics  4  October 31st, 2011 02:11 PM 
Probability Question  skate_rds  Advanced Statistics  3  March 17th, 2011 07:37 AM 
Another Probability Question  skate_rds  Advanced Statistics  0  February 6th, 2011 09:16 PM 
Probability question  madflame991  Probability and Statistics  0  February 1st, 2011 01:06 AM 
Probability question  tnutty  Advanced Statistics  1  January 27th, 2011 04:31 PM 