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Difference of Two Sets

Let U = 1, 2,...

Question

Let $U = {1, 2, 4, 6, 8, 9}, A = {1, 2, 4}$ , then find $A^{'}$ .

A^{'} = {1, 2, 4}

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A^{'} = {6, 8, 9}

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A^{'} = {1, 9}

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A^{'} = {2, 4, 8}

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Solution

The correct option is B $A^{'} = {6, 8, 9}$
$A^{'} = U - A$
$= {1, 2, 4, 6, 8, 9} - {1, 2, 4}$
$= {6, 8, 9}$

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