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Home  >>  CBSE XI  >>  Math  >>  Permutations and Combinations
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The number of ways four boys can be seated around a round-table in four chairs of different colours is

$\begin{array}{1 1}(A)\;24\\(B)\;12\\(C)\;23\\(D)\;64\end{array} $

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1 Answer

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  • $n!=n(n-1)(n-2)(n-3).....(3)(2)(1)$
Total no of boys =4
Total no of chairs =4
Required number of ways =4!
$\Rightarrow 4\times 3\times 2\times 1$
$\Rightarrow 24$
Hence (A) is the correct answer.
answered Jun 20, 2014 by sreemathi.v
 

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