Given that and are two outcomes of a random experiment, , , and , find .
The notation refers to the probability of
either event or event occurring, or both. If and
are two non-mutually exclusive events, then , where the notation
refers to the probability of events
and occurring together. The notation means that
is a subset of , so must equal
. Use this fact to help determine as follows:
Thus, is equal to 0.38.