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If A and B are two events, then the probability of A given that B has already occurred is written as . This is known as conditional probability.
On the Venn diagram below the possibility space is the set B as this has already occurred.
Hence .
If all the possible events are represented by the universal set S, then
.
Дата публикования: 2014-11-03; Прочитано: 352 | Нарушение авторского права страницы | Мы поможем в написании вашей работы!