# Definition of Probability

## Probability = # of Favorable Outcomes/# of Possible Outcomes

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.
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## Basic Probability

by CK-12 //basic
Walks through some probability practice problems.
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## Probability Part 1

by CK-12 //basic
Introduces ways to calculate probability.
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## Probability of an Event - Overview

by CK-12 //basic
Overview
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## Probability of an Event - Example 1

by CK-12 //basic
Find the sample space
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## Probability of an Event - Example 2

by CK-12 //basic
Find the probability of an event
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## Probability of an Event - Example 3

by CK-12 //basic
Find the probability of an event using combinations - Lottery Word Problems
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