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

For the three events `A ,B`, and `C` ,`P` (exactly one of the events `A or B` occurs)=`P` (exactly one of the two evens `B or C` )=`P` (exactly one of the events `C or A` occurs)=`p` and `P` (all the three events occur simultaneously)=`p^2` where `0`<`p`<`1//2`. Then the probability of at least one of the three events `A , B and C` occurring is

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