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Racer Vodon (vodon)
Race Number 1124
Date Fri, 15 Sep 2017 04:45:23 +0000
Speed 60 WPM Try to beat?
Accuracy 95.6%
Rank 3rd place (out of 4)
Opponents mshow (2nd place) xiaodre123 (1st place)

Text typed:

Property (c) is known as countable additivity. It is not something that can be proved, but it is like an assumption or an axiom. In our experience, we have seen that operating as if the assumption is correct leads to useful and credible answers to many problems, so we accept it as a reasonable assumption. Not all probabilists agree that countable additivity is natural.
Fundamentals of Probability: A First Course (book) by Anirban DasGupta (see stats)

Typing Review: