Can someone help me solve this question?

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1 Answer
Mar 13, 2018

First choice, namely #(AuuB)^c#

Explanation:

As #A={1,3,6,9,12,15,18}# and #B={2,9,11,20}#

#AuuB={1,2,3,6,9,11,12,15,18,20}#

and #AnnB={9}#

Let #C={4,5,7,8,10,13,14,16,17,19}#.

It is eveident that #C#

  • has no element common with #AuuB# and
  • #Cuu(AuuB)=U#

Hence #{4,5,7,8,10,13,14,16,17,19}# is complemetary set of #AuuB# and answer is #(AuuB)^c#