In answering a question on a multiple choice test a student either knows the answer or guesses.
Channel: Doubtnut
Date: 2019-12-27

In answering a question on a multiple choice test a student either knows the answer or guesses. Let the probability that he knows the answer is `3/4` and probability that he guesses is `1/4`. Assuming that a student who guesses the answer and given correct answer is `1/4`. What is the probability that student knows the answer given that he answered it correctly?

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