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MathsJEE Main 22 Jan 2026, Shift 2·Q25·Numerical·Easy–moderate

Permutations & Combinations · Counting subsets

Let SS be the set of the first 11 natural numbers. Then the number of elements in A={B⊆S:n(B)≥2 and the product of all elements of B is even}A = \{B \subseteq S : n(B) \ge 2 \text{ and the product of all elements of } B \text{ is even}\} is .

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See the full 22 Jan 2026, Shift 2 paper