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Home  >>  CBSE XI  >>  Math  >>  Permutations and Combinations

True-or-False:If some or all of n objects are taken at a time,the number of combinations is $2^n-1$

$\begin{array}{1 1}(A)\;\text{True}\\(B)\;\text{False}\end{array} $

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No of objects =n
No of combinations =$2^n-1$
Hence it is true.
answered May 16, 2014 by sreemathi.v

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