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# Complement Rule for Probability

## If P(A) is is the probability that event A happens then the probability that event A doesn't happen is 1-P(A).

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Complement Rule for Probability

Learn how to find the probability of complementary events.
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## Complement Rule for Probability

Discover how to use the Complement Rule to calculate an unknown complement when a known complement is given.
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## Identify Overlapping, Disjoint, and Complementary Events

Learn to identify and distinguish between overlapping, disjoint and complementary events.
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## Identifying the Complement

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## Finding Probability by Finding the Complement

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## Complement Rule for Probability

Learn how to find the probability of complementary events.
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• PLIX

## Chances in an Election

Complement Rule for Probability Interactive
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• Real World Application

## Chances of a Cure

Find out how scientists are helping children beat cancer.
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• Real World Application