You know that a certain document is equally likely to be in any one of four different folders. Let ?? be the probability that you will find your document upon making a quick examination of folder i if the document is, in fact, in folder i, i = 1, 2, 3, 4. (a) What is the probability that the document is in folder i? (b) Suppose you look in folder 1 and do not find the document. What is the probability that the document is in folder 1?

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