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For three events A, B and C, P (Exactly one of A or B occurs) = P(Exactly one of B or C occurs) = P(Exactly one of C or A occurs) = 4 1 and P(All the three events occur simultaneously) = 16 1 . Then the probability that at least one of the events occurs, is :

1. 16 7
2. 64 7
3. 16 3
4. 32 7 Students may find similar question in CP exercise sheet : [ JEE Main, Chapter : Probability, Page 35, Ex. 3, Q. No. 6 ]

Correct answer: 16 7

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