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Home  >>  CBSE XI  >>  Math  >>  Sets
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Find the intersection of each pair of the following set : $A=\{x : x$ is a natural number and multiple of $3\},B=\{x : x$ is a natural number less than $6\}$

$\begin{array}{1 1}(A)\;\{1,2,3,4,5,6\}&(B)\;\{3,6,9,12.....\}\\(C)\;\{3,6\}&(D)\;\{3\}\end{array} $

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1 Answer

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A={3,6,9,12.....}
B={1,2,3,4,5}
Here 3 is the common element to both A & B set
$\therefore A\cap B=\{3,6,9,12......\}\cap \{1,2,3,4,5\}$
$\Rightarrow \{3\}$
Hence (D) is the correct answer.
answered May 27, 2014 by sreemathi.v
 

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