Question

If U={1,2,3,4…….,20}, A={1,3,5…..,15}, B={2,4,6,….,14}, C={2,3,……13} then find a.A b.U-A c.U-(AUB)

Answer 1

A) {1,3,5,.....,15}

B) {2,4,6,...14,16,17,18,19,20}

C) aUb={1,2,3,...,15}
={16,17,18,19,20}

@skb

Answer 2

Hey friend,

Here is your answer,
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U = {1,2,3…….,20}

A = {1,3,5…..,15}

B = {2,4,6,….,14}

C = {2,3,……13}



a.)  A = {1,3,5,7,9,11,13,15}

b.) U - A  = {1,2,3,4..........19,20} - {1,3,5,.......15}
               = {2,4,6,8,10,12,14,16,17,18,19,20}

c.) U - (A∪B) = {1,2,3,4.......19,20} - [{1,3,5......15} ∪ {2,4,6,.....12,14}]
                     =  {1,2,3,4.......19,20} - {1,2,3.....15}
                     =  {16,17,18,19,20}

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