Probability

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8 Terms

1
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Complement

Use it for “at least one” P(not A) = 1 - P(A)

2
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Addition Rule, subtracts the overlap

P(A or B) = P(A) + P(B) - P(A and B)

3
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Addition Rule, disjoint

P(A or B) = P(A) + P(B)

4
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Multiplication Rule, A and B are independent

P (A and B) = P(A) * P(B)

5
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Conditional Probability

P (A if B) = P(A and B)/P(B)

6
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Multiplication Rule, not independent

P (A and B) = P(A) P(B if A)

7
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Law of Total Probability

P(B) = P(B if A) P(A) + P(B if A2) P (A2) + …. Adds up the branches of the tree

8
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Bayes’ Rule

P (A if B) = P(B if A) P(A) / P(B)