text: It is currently 20 Jul 2017, 09:43
  
  ### GMAT Club Daily Prep
  
  #### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
  
  Customized
  for You
  
  we will pick new questions that match your level based on your Timer History
  
  Track
  
  every week, we’ll send you an estimated GMAT score based on your performance
  
  Practice
  Pays
  
  we will pick new questions that match your level based on your Timer History
  
  # Events & Promotions
  
  ###### Events & Promotions in June
  Open Detailed Calendar
  
  # Let A and B be events such that P(A ^ B) = 1/4, P(
  
  Author Message
  SVP
  Joined: 16 Oct 2003
  Posts: 1801
  Let A and B be events such that P(A ^ B) = 1/4, P( [#permalink]
  
  ### Show Tags
  
  04 Nov 2003, 13:40
  This topic is locked. If you want to discuss this question please re-post it in the respective forum.
  
  Let A and B be events such that P(A ^ B) = 1/4, P( ╦Ь A) = 1/3, and P(B) =
  1/2. What is P(A U B)?
  Intern
  Joined: 04 Oct 2003
  Posts: 42
  Location: Silicon Valley, CA
  
  ### Show Tags
  
  04 Nov 2003, 19:52
  does P(A ANd B) mean P(A OR B)
  
  the formula that you are looking for i s
  P(A OR B) = P(A) + P(B) - P (A AND B)
  = 1 - P(~A) + P(B) - P(A AND B)
  = 1 - 1/3 + 1/2 - 1/4
  = 11/12
  SVP
  Joined: 03 Feb 2003
  Posts: 1604
  
  ### Show Tags
  
  05 Nov 2003, 00:38
  agree
  P(A OR B) = P(A) + P(B) - P (A AND B)
  1/4=2/3+1/2-X
  X=11/12
  05 Nov 2003, 00:38
  Display posts from previous: Sort by
metadata: {"found_math": false, "script_math_tex": 0, "script_math_asciimath": 0, "math_annotations": 0, "math_alttext": 0, "mathml": 0, "mathjax_tag": 0, "mathjax_inline_tex": 0, "mathjax_display_tex": 0, "mathjax_asciimath": 0, "img_math": 0, "codecogs_latex": 0, "wp_latex": 0, "mimetex.cgi": 0, "/images/math/codecogs": 0, "mathtex.cgi": 0, "katex": 0, "math-container": 0, "wp-katex-eq": 0, "align": 0, "equation": 0, "x-ck12": 0, "texerror": 0}