Zack (zack_mitkin)

Race #459

View Pit Stop page for race #459 by zack_mitkin — Ghost race

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Official speed 74.89 wpm (59.45 seconds elapsed during race)
Race Start August 9, 2019 2:44:16pm UTC
Race Finish August 9, 2019 2:45:15pm UTC
Outcome Win (1 of 5)
Accuracy 96.0%
Points 79.89
Text #3640570 (Length: 371 characters)

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.