Please explain the question posted in the file attached.

CB

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- Jun 19th 2007, 07:51 PMcomputer-botProblem with equation of independent events
Please explain the question posted in the file attached.

CB - Jun 19th 2007, 08:42 PMCaptainBlack
- Jun 20th 2007, 05:24 AMcomputer-bot
CaptainBlack I know what does A intersection B means but what I don't understand is that what does this statement |A and B|/|B| has to do with the occurence of two events. I mean the author said that "The probability that A occurs is P(A) = |A|/6 = 3/6 = 1/2, while presuming B occurs, the probability that A occurs is

**|A and B|/|B|.**What I am trying to understand is that how did the author form this equation for this situation. I hope my question is clear. - Jun 20th 2007, 07:08 AMPlato
The probability of A happening given that B has occurred in symbols is

.

That explains the intersection in your question.

Thus if A and B are independent that means that

.