JEE Main 2019 Mathematics question
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:
Answer: (B)
Solution
All subsets minus those with only odd elements: .
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:
All subsets minus those with only odd elements: .