Summary of Probability
All probabilities lie between zero and one. Events that can never happen together are called mutually exclusive events. Independent events mean that the probability of each one happening does not affect the probability of the others positively or negatively. The probability that two events will happen together is the result of their multiplication while the probability of having either of them is the result of their addition.
Flashcards on Probability
The probability of having either event X or event Y can be calculated by (adding up/subtracting) the two probabilities, assuming that X and Y are mutually exclusive.