High School · Conditional Probability and the Rules of Probability

CCSS.MATH.CONTENT.HSS.CP.A.3

Understand the conditional probability of A given B as P(A and B)/P(B), and interpret independence of A and B as saying that the conditional probability of A given B is the same as the probability of A, and the conditional probability of B given A is the same as the probability of B.

Read this standard on the official Common Core site

Lessons that teach this standard

• Conditional Probability: The Probability of A Given B

  What 'given that' does to a sample space, finding a conditional probability from a table or the formula, why P(A|B) and P(B|A) differ, and the multiplication rule.

• Independent Events: Testing for Independence

  What it means for two events to be independent, the two equivalent tests for it, how to decide from a two-way table, and why independent is not mutually exclusive.