My Math Forum describe the shaded region of the Venn diagram:

 Probability and Statistics Basic Probability and Statistics Math Forum

 June 6th, 2017, 09:42 AM #1 Member   Joined: Jan 2016 From: Blackpool Posts: 56 Thanks: 1 describe the shaded region of the Venn diagram: Imgur: The most awesome images on the Internet I got x belongs to (a\(a and b and c) or (b and c \a) where "\"=but not
 June 6th, 2017, 10:18 AM #2 Senior Member   Joined: Aug 2012 Posts: 1,626 Thanks: 413 Everything that's in A but not in A, B, and C.
 June 6th, 2017, 02:10 PM #3 Math Team   Joined: Jul 2011 From: Texas Posts: 2,656 Thanks: 1327 may not be the most efficient use of notation, but I believe this works ... $A \cap (A \cap B \cap C)' \cup [(B \cap C) \cap A']$
 June 6th, 2017, 03:26 PM #4 Senior Member   Joined: Aug 2012 Posts: 1,626 Thanks: 413 Oh I see my idea is wrong.

 Tags describe, diagram, region, shaded, venn