A.1 only B. 2only C. 1and3 only D. 2and3 only E. 1,2 and 3
- A={x\x is an integer,1<x<12} and
B={x\x is a positive integer and less than 15 and x is multiple of3}then A∩B is
A.{3,6,9,12} B{2,3,4,5,6,7,8,9,10,11} C.{6,9,12} D.{3,6,9,12,15} E.{3,6,9}
14.If A≠B, which of the following is true?
A. A∩B=B∩A B.A∪B=B∪A C.A∪A=A D.B∩B=B
E.A\B=B\A
15.If S={1,2,3,4,5,6,7} is the universal set ,P={1,2,3,4} and Q´={1,2,7}, then P∩Q=…..
A. {1,2,3} B.{3,4} C.{3} D.{4} E.∅
16.If P∪Q={x,y,z,u,v},P∩Q={z,u} ,P\Q={x,v} then Q\P=…….
A.{y,z,u} B. {y} C.{x,u,v} D. ∅ E. None of these
17.Given E={2,4} ,F={4,6,8,x} The value of x such that E\F=∅
A.0 B.2 C.4 D.6 E.8
18.Let n(P) denotes the number of elements in set P. Given that n(P)=7 and n(Q)=3
the largest possible value of n(P∩Q) is
A.10 B.9 C.7 D.4 E.3
