Mathematics · 2019
JEE Main · 12 January 2019, Shift 1 · Q61
Let S={1,2,3, …, 100}. The number of non-empty subsets A of S such that the product of elements in A is even is:
Let $\displaystyle S=\{1,2,3, \ldots, 100\}$. The number of non-empty subsets A of S such that the product of elements in A is even is :
Official answer
(3)
$\displaystyle 2^{50}\left(2^{50}-1\right)$
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JEE Main 2019 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.