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Compute A^c – B and draw a Venn diagram.



Given that

U={xIxW,x20}

A={xP,x20}

B={xN,x15}

Where P is the set of prime numbers and N is the set of Natural Numbers

Compute AcB and draw a Venn diagram.





Solution:


Here


U = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}

A={2,3,5,7,11,13,17,19}

B={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}

First, we compute Ac

Ac = U – A = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20} - {2,3,5,7,11,13,17,19}

= {0,4,6,8,9,10,12,14,16,18,20}

Now we compute AcB

AcB = {0,4,6,8,9,10,12,14,16,18,20} - {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}

={0,16,18,20}

Venn diagram





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