How is the concept of independence used in probability theory?

To calculate the probability of an event without any prior information
To describe events that always occur together
To describe events that are mutually exclusive
To describe events that have no influence on each other

Independence in probability theory refers to situations where the occurrence of one event does not affect the occurrence of another event. In other words, Events A and B are independent if the fact that A occurs does not affect the probability of B occurring.

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