
Probability and Statistics Basic Probability and Statistics Math Forum 
 LinkBack  Thread Tools  Display Modes 
August 5th, 2019, 12:34 AM  #1 
Newbie Joined: Aug 2019 From: Australia Posts: 1 Thanks: 0  Tricky Conditional Probability Question
Hi, Having trouble with the following conditional probability question, please see the attachment below titled Capture1. Any help would be appreciated. 
August 5th, 2019, 07:42 AM  #2 
Senior Member Joined: Sep 2015 From: USA Posts: 2,529 Thanks: 1389 
either $A$ happened or it didn't, $A$ and $\bar{A}$ are mutually exclusive events, so $P[B]=P[BA] + P[B\bar{A}] = 0.2 + 0.7 = 0.9$ $P[AB] = \dfrac{P[BA]P[A]}{P[B]} = \dfrac{(0.2)(0.8 )}{0.9} \approx 0.178$ 

Tags 
conditional, probability, question, statistics or probability, tricky 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Tricky Probability question  Young001  Probability and Statistics  1  October 25th, 2018 05:21 PM 
Tricky question in Probability  kaushiks.nitt  Advanced Statistics  9  August 9th, 2013 01:07 PM 
Tricky probability question  can anyone help?  nforrin  Advanced Statistics  12  July 16th, 2013 07:39 PM 
Conditional Probability Old Exam Question  uberjason7  Probability and Statistics  0  May 24th, 2013 05:56 AM 
One conditional probability question!  eChung00  Advanced Statistics  1  March 15th, 2013 12:51 AM 