JEE (Advanced) 2019 Paper-2 Question 47

Question 47

Let |X| denote the number of elements in a set X. Let S = {1, 2,3, 4,5, 6} be a sample space, where each element is equally likely to occur. If A and B are independent events associated with S, then the number of ordered pairs (A, B) such that $$1 \leq |B| < |A|$$, equals ________

Correct Answer: e

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