A, B and C are three non-empty sets. If `A sub B and B subC` then which the following is true?

Let A, B, C be any three non-empty sets. If A uuB= A uuC, then which one of the following is denfinitely true ?

A and B are non-empty sets A - B = A and B - A = B. Then which of the following is true ?

Let A, B and C be three sets, then which of the following is true?

Let A and B be two non-empty subsets of set X. If (A-B)U(B-A)=AUB then which of the following is incorrect? a) A sub B b) A sub(X-B) c) A=B( d) B sub A

If A and B are non-empty sets such that A sup B, then

If A and B are two non empty sets then AUB=A nn B iff

If A,B,C are three non-empty sets,draw the Venn-diagrams for which the following properties are valid.