Mutually exclusive events, events that cannot occur at the same time., Complementary events of set E, is the set of all elements that are not in E., P(E)=1, event is certain (it has to happen)., P(E)=0, the event is impossible., 0 ≤ P(E ) ≤ 1, The sum of all (mutually exclusive) probabilities is 1., Relative frequency, is the number of times an outcome happens compared to the total number of trials., We can write relative frequency, as a fraction, ratio, decimal or percentage.

Probability 7.2 & 7.3

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