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Assume that the conditional probability of an email (chosen uniformly and randomly from a set of emails) containing the word payment, given that the email

Assume that the conditional probability of an email (chosen uniformly and randomly from a set of emails) containing the word "payment", given that the email is a spam email, is 72 % . Suppose that the conditional probability of an email being spam, given that it contains the word "payment", is 8 % . Find the ratio of the probability that an email is spam to the probability that an email contains the word "payment

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