Probability Formulas

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7 Terms

1
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P(A and B) = 0

Disjoint Events

2
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P(A|B) = P(A) and P(B|A) = P(B)

Independent Events

3
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P( A or B) = P(A) + P(B) - P(A and B)

OR Rule (General Addition)

4
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P(A or B) = P(A) + P(B)

OR Rule for Disjoint Events

5
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P(A and B) = P(A) * P(B|A)

AND Rule (General Multiplication)

6
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P(A and B) = P(A) * P(B)

AND Rule for Independent Events

7
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P(B|A) = P(A and B)/P(A)

Conditional Probability