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April 25th, 2014, 01:38 PM   #1
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Markov Chains

Hey guys,

I just have a quick question regarding markov chains, I have always wondered how come we are allowed to add probabilities without subtracting their intersection. For example I know using the matrix we just multiply and add, but wondered due to the main rules of probability that we have to remove the intersection when calculating a union.

Thanks, Wassem
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April 26th, 2014, 12:40 PM   #2
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Probabilities add for disjoint events. Discrete Markov chains - each step there are several possible (disjoint!) outcomes.
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