Two events are dependent if... - one event affects the probability of the other., Two events are independent if... - one event does not affect the probability of the other., When the two events are dependent the formula used is - P(A and B) = P(A) x P(B given A), When the two events are independent the formula used is - P(A and B) = P(A) x P(B), Two events are non-overlapping if... - they cannot occur together., When two events are non-overlapping, the formula used is - P(A or B) = P(A) + P(B), Two events are overlapping if... - they can occur together., When two events are overlapping, the formula we use is - P(A or B) = P(A) + P(B) - P(A and B),

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