28.If AB ={1,2,3,4,5,6,7,8} and AB={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 AB´={1,2} and B´={1,2,3}, then AB=…….
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(PQ)=2, then n(PQ)=…….
A.2 B.4 C.6 D.8 E.10
31.If the universal set contains 500elements, n(A)=240, n(AB)=460,n(AB)=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.XY={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)}
- Given that BxA={(2,1),(2,2),(x,1),(x,2)}.Then AxA=……….
A. {1,2} B.{(2,2),(2,x),(x,2),(x,x)} C.{(1,2),(2,1)}
D. {(1,1),(1,2),(2,1),(2,2)} E. {(1,1),(2,2),(x,x)} - If W={x,y} ,which of the following is falsfe?
A.(x,x) WxW B. {(x,y)} WxW C.(x,y) WxW D. (y,y) WxW E.{(y,y)}WxW 36.If n(AxB)=24 and n(BxB)=36 ,then the largest possible value of n(AB) is……
A.6 B. 4 C.2 D.10 E.12
37.The shaded region of the diagram represents the subset
A. PQ∩R B. P´∩Q∩R´ C. P∪Q∪R D. P´∩Q´∩R´ E. (P∪Q)∩R´
- The shaded region of the diagram represents the subset
A. PQ∩R B. P´∩Q∩R´ C. P∪Q∪R D. P´∩Q´∩R´ E. (P∪Q)∩R´
