A.1 only B. 2 only C.3 only D.1 and 2 only E.2 and 3 only 3.Given that S= {0,1,2,3,4} is the universal set and A={ x\ x3 – 9x =0 }.Then A=…….. A.{ -3 , 0, 3 } B. { -3 , 0 } C.{ 0 , 3 } D.{ -3 , -3 } E.{0,9}

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If n(A∪B)=28, and n (A∩B) =9 , n(A\B)=7. then n(B\A)=………. A. 12 B. 16 C. 21 D. 19 E. 5 If A={1,3,5,7,9} and B´={1,2,3,4,5} , then A\B=…… A.{7,9} B.{2,4} C.{1,3,5} D. {1,2,3,4,5,7,9} E. None of these 28.If

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