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Conjunction of two events

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Probability index
Conjunction of two events diagram
The probabilities of various possible outcomes from 2 events with different chances of happening. You may choose other convenient units such as % from the menu if desired.
Probability of event A
Probability of event B

Chance of both happening
Chance of neither happening
Chance of at least one happening
Chance of exactly one happening
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Remember that the simple probability of an event happening can not be more than 1 (certainty) or less than 0 (certainty it will not happen). Other unit choices have other meaningful ranges (e.g. 0-100 for a percentage).