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If the occurrence or non-occurrence of an event A does not influence in any way the probability of an event B then the event B is said to be independent of event A.
In this case
Now we know that
For independent events,
NOTE! This is only true if A and B are independent events.
To tackle questions on independent events we sometimes use a possibility space diagram but a more powerful tool is a tree diagram.
Дата публикования: 2014-11-03; Прочитано: 297 | Нарушение авторского права страницы | Мы поможем в написании вашей работы!