Good 1 Steve so I sux at math but your here :) Heres another:

Question

X = [students playing football], Y = [students playing baseball], and Z = [students playing rugby]. Draw a Venn diagram of Z – (X U Y), and write a sentence describing what the set represents:

Answer 1

this is bogus. Maybe X,Y,Z are all disjoint. So, Z – (X U Y) = Z

maybe Z⊆(XUY) so Z – (X U Y) = Ø

Looks like you're on your own for this one.