Where p(x) is the probability of event x, n0 is the number of ways event x is possible and n is
the total number of possible events.
This is the simple approach to probability and it assumes that outcomes are completely
random and that each event is equally likely to occur. This is generally the case for most casino games. We can say that a craps dice is just as likely to come 1, 2, 3, 4, 5 or 6. So in
this kind of situation we can make a ratio between each event and the number of events to
determine the probability. In the case of the craps dice we have 6 possible outcomes, so we
can say that the probability of a 3 coming up is 1 / 6 or about 16.7% . Or we could ask, what
is the probability of an even number being rolled. There are 3 ways to make an even
number; 2, 4 or 6. There are 6 possible events. So the probability of an even number is 3
(the number of ways to roll even) / 6 (the number of possible outcomes). We can expect to
see an even number 50% of the time. |
