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If $A=\{1,2,3,4\},B=\{3,4,5,6\},C=\{5,6,7,8\}$ and $D=\{7,8,9,10\}$ Find $A \cup B\cup D$

$\begin{array}{1 1}(A)\;\{1,2,3,4,5\}\\(B)\;\{1,2,3,4,5,6,7,8,9,10\}\\(C)\;\{1,2,3,4,5,6,7\}\\(D)\;\{1,2,3,4\}\end{array} $

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1 Answer

$A=\{1,2,3,4\}$
$B=\{3,4,5,6\}$
$D=\{7,8,9,10\}$
$A \cup B\cup D$
$A \cup B=\{1,2,3,4\} \cup \{3,4,5,6\}$
$A \cup B\cup D$=$\{1,2,3,4,5,6\}\cup \{7,8,9,10\}$
$\Rightarrow \{1,2,3,4,5,6,7,8,9,10\}$
Hence (B) is the correct answer.
answered May 26, 2014 by sreemathi.v
 
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