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JEE Main Mathematics question

MathematicsPermutations and CombinationsJEE Main

The number of all the possible selections which a student can make for answering one or more questions out of eight given questions in a paper, when each question has an alternative is

Answer: (B)

Solution

For each question there are possibilities: answer it, answer its alternative, or leave it. All questions together give

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Question ID VK-020811