Conditional probability. Independence of events
Conditional probability. Independent and dependent events.
The probability of occurrence of an event A at the condition, that an event B takes place, is called the conditional probability and calculated by the formula:
where À , Â Å , Ð ( Â ) 0.
The events À , Â Å are independent events , if Ð ( À Â ) = Ð ( À ) · Ð ( Â ).
Otherwise, the events À and Â are called dependent events .