Question: Exercise 3.14 Prove the discrete version of expression (3.9). That is, for n possible causes Ci suppose that A1 and A2 are two conditionally independent

Exercise 3.14 Prove the discrete version of expression (3.9). That is, for n possible ‘causes’ Ci suppose that A1 and A2 are two conditionally independent events such that P(A1 A2 | Ci) = P(A1 | Ci) P(A2 | Ci), i = 1,..., n, and let P(Ci) = 1/n. Then show that P(A1 | A2 ) = P(A2 | Ci)P(Ci | A1 ).

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