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Re: subset query ! [#permalink]
29 Jun 2011, 04:22

Ans 1 - This question means that, if you select the elements of the set in all possible ways, how many of them would comprise odd numbers. So you can select 0,1,2,3,4 elements at a time. fluke has shown how many combinations are there for 1 and 3 elements. _________________

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)