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P(fish for hours) = =
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P(fish for but hours) = P(first catch in hours) = which is no fish in but at least fish in the next hours (which will be independent of first hours)
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P(catch at least two fish) = P(at least catches before hours) =
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has two possibilities, either single fish after hours, or many fist before hours.
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Total fishing time = , since we fish for atlest hours
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future fishing time fished for two hours can be obtained using the memoryless property of Poisson process. The expected time till first arrival is independent of what has happened till now. Thus,