Discrete probability distributions - Probability rules and trees

3 important questions on Discrete probability distributions - Probability rules and trees

For which rule is the formula P(A) = 1 − P(Ac)?

Complement rule

How do you call the rule that allows us to calculate the probability of the union of two mutually exclusive events and is calculated with the formula P(A or B) = P(A) + P(B) ?

Addition rule for mutually exclusive events

How do you call a depiction of events as branches of a tree?

Probability tree

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