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October 15th, 2017, 06:47 PM  #1 
Newbie Joined: Oct 2017 From: UK Posts: 1 Thanks: 0  P(aub)=?
if P(A∩B)=0.04, P(A∩(1P(B)))=0.38 how do you calculate P(A) = ?

October 15th, 2017, 07:01 PM  #2 
Senior Member Joined: Feb 2016 From: Australia Posts: 1,597 Thanks: 546 Math Focus: Yet to find out. 
What have you tried? It might help to draw a diagram showing the intersection of A and B, and the compliment of B. Then try to form an expression for P(A).

October 16th, 2017, 01:14 PM  #3 
Global Moderator Joined: May 2007 Posts: 6,527 Thanks: 588 
P(A∩(1P(B))) doesn't look right. Did you mean P(A∩B')?

October 23rd, 2017, 11:02 AM  #4 
Math Team Joined: Jan 2015 From: Alabama Posts: 3,195 Thanks: 872  