Question: There is an MCQ with four options; a student either knows the correct answer with a probability of 0.6 or randomly guesses the correct answer

There is an MCQ with four options; a student either knows the correct answer with a probability of 0.6 or randomly guesses the correct answer with a probability of 0.25. Given that the student answers the question correctly, what is the probability that the student actually knows the answer?

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