Читать книгу Probability - Robert P. Dobrow - Страница 21

ADDITION RULE FOR MUTUALLY EXCLUSIVE EVENTS

Оглавление

If and are mutually exclusive events, then


The addition rule is a consequence of the third defining property of a probability function. We have that


where the third equality follows because the events are disjoint, so no outcome will be counted twice. The addition rule for mutually exclusive events extends to more than two events.

Probability

Подняться наверх