Formulae for Probability

Works for All Cases:

1. P(A∪B)=P(A)+P(B)-P(A∩B)

2. P(A|B)=

3. P(A’)=1-P(A)

For Mutually Exclusive Events Only:

1. P(A∩B)=0

For Independent Events Only:

1. P(A∩B)=P(A) P(B)

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

3. P(B|A)=P(B)

4. P(A’∩B)=P(A’) P(B)

5. P(A∩B’)=P(A) P(B’)

6. P(A’∩B’)=P(A’) P(B’)

Author: mathtuition88

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