1.0 KiB
1.0 KiB
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| Conditional Probability |
Conditional Probability
A conditional probability is the probability of an event, given some other event has already occurred. So, for example, the conditional probability of an event A is the probability that the event will occur given that an event B has already occurred. This probability is denoted as P(A|B).
The conditional probability of an event A given that an event B has occurred is written as follows:
as long as P(B) > 0
NOTE - In the case where events A and B are independent (where event B has no effect on the probability of event A), the conditional probability of event A given event B is simply the probability of event A, i.e. P(A).