December 30th, 2018, 08:44 AM  #1 
Newbie Joined: Nov 2018 From: nigeria Posts: 1 Thanks: 0  set problem
given that n(PnQ)=n(PnQ)' find x and hence the U

December 30th, 2018, 10:48 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,370 Thanks: 2007 
Given what?

December 31st, 2018, 11:17 AM  #3 
Senior Member Joined: Feb 2010 Posts: 704 Thanks: 138 
Assuming that all four labeled regions are disjoint, I get $\displaystyle 4= x + (x16) + (x11)$ but that yields a non integral answer. $\displaystyle x=\frac{31}{3}$ So the union would be $\displaystyle 4+(31/316)+(31/311)$ but this makes no sense. Last edited by mrtwhs; December 31st, 2018 at 11:21 AM. 