={1,5,7} then (A\B)∪ (B\A)=………
A. ∅ B.{1,3,5} C. {2,3,4,6,8} D.{1,2,3,4,5,6,7,8} E.It is impossible to determine
29.Let S={1,2,3,4,5} be the universal set. If A∩B´={1,2} and B´={1,2,3}, then A∪B=…….
A. {5} B.{3,4} C.{3,4,5} D.{1,2,3,4} E. S
30.If P and Q are the two sets such that n(P)=4, n(Q)=6, n(P∩Q)=2, then n(P∪Q)=…….
A.2 B.4 C.6 D.8 E.10
31.If the universal set contains 500elements, n(A)=240, n(A∪B)=460,n(A∩B)=55,then(B´)=….
A. 275 B.225 C.125 D.325 E.175
32.For the Venn diagram, which of the following is (are) true;
1.X∩Y={3,4} 2. X\Y={1,2} 3.Y\X={5,6}
A.1 only B. 2 only C. 3 only D. 2 and 3 only E. 1,2 and 3
33.If P={a,b} and Q={x,y} , then PxQ=……….
A. {(a,x),(b,y)} B. {(a,x),(a,y)} C. {(a,x),(a,y),(b,x),(b,y)}
D.{(x,a),(x,b),(y,a),(y,b)} E.{(x,a),(y,b)}