By: Neil E. Cotter

Probability

 

 

Conditional probability

 

 

Discrete random variables

 

 

Example 3

 
 
 

 

Ex:           Given P(B, C) = 0.4, P(B, C | A) = 0.8, P(A | B, C) = 0.6. Find P(A).

Sol'n:                  The following formula defines conditional probability:

We can solve for P(A) by rearranging this equation and using various events in place of A and B.

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