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BayesTheorem.md (549B)

      1 # Bayes Threoem 
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      3 L2
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      5 **Definition:** Bayes theroem is $P(A|B) = \frac{P(B|A)P(A)}{P(B)}$
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      7 This can be derived by the conditional probability theroem.
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      9 Bayes theroem allows us to update the probability of some outcome given known information.
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     11 ## Intuition
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     13 The probability that I have cancer (A) given that I have some symptoms of cancer (B) is equal to the probability that I have symptoms of cancer (B) given that I have cancer (A) multiplied by the overall probability that I have cancer (A) divided by the probability that I have symptoms (B).