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Probability

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What does 'or' indicate in probability?
'Or' refers to the union of events, where at least one of the events must occur. For mutually exclusive events, $P(A \text{ or } B) = P(A) + P(B)$.
How do you represent a compound event using a tree diagram?
A tree diagram visually represents all possible outcomes of a compound event, branching for each stage or decision.
What does 'and' mean in probability?
'And' refers to the intersection of events, where both events must occur. For independent events, $P(A \text{ and } B) = P(A) \times P(B)$.
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