Friday, February 6, 2015

Conditional Probability


I have always found probability to be a tricky subject.. A tree diagram helps in dealing with more than one event but in  a single event, things can be different as  can be seen in one of the solutions from Khan Academy, World of Maths below:-
 Let A be the event that the first die is 1 and B be the event that the dice sum to 3We can find P(B | A) by finding all of the outcomes where the sum of the dice is 3, given that the first die is 1. There is only outcome that meets these conditions, and there are 6 total outcomes where the first die is 1,
Therefore, P(B | A)=16.

The video below appears to be dealing with more than one event.



    Calculating conditional probability



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