Question: . Let a document classifier can detect whether a news articles is about sports or not. Assume that the word 'player' occurs in 80% of

. Let a document classifier can detect whether a news articles is about sports or not. Assume that the word 'player' occurs in 80% of the articles that are related to sports and occurs in 10% of the documents which are not related to sports. In a set of documents, 30% are about sports.

a) If a document is picked at random and it has the word 'player'. What is the probability that this document is about sports?

b) If the word 'player' was not found, what is the probability that the document is about sports?

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