ACT Math

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Last updated 5:16 PM on 6/24/26
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5 Terms

1
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Probability of an event formula

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2
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A∩B

Intersection: outcomes that two events have in common (keyword: AND)

3
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A∪B

Union: outcomes in either event, with no duplicates (keyword: OR)

4
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Mutually exclusive events

A∩B = ∅; For example, rolling an even and odd number at the same time cannot happen

5
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Complement events

Outcomes not in an event (keyword: NOT)