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For the three events A, B and C, P(exact...

For the three events `A`, `B` and `C`, `P`(exactly one of the events A or B occurs) `= P`(exactly one of the events B or C occurs) `=P`(exactly one of the events C or A occurs)`= p` and `P`(all the three events occur simultaneously) `= p^2`, where `0ltplt1/2`. Then, find the probability of occurrence of at least one of the events `A`, `B` and `C`.

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