Hello, all. So, I've been sitting here for at least an hour attempting to figure this out, but no dice.
A recent transportation survey of w urban commuters (that is, n(U)=w) yielded the following information:
X rode neither trains nor buses
Y rode trains
Z rode only trains
How many people rode (a) trains and buses, (b) only buses, (c) buses, and (d) trains or buses?
Basically what I got to was:
I really have no idea where X would go. Not sure if I would add it to W for some reason or if I would just exclude it. I also figured that Y could go within the intersection, but I was not exactly sure of this. Either way, this is as far as I've gone and it doesn't look like I am able to get much further.
Any input would be greatly appreciated.