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A student answers a multiple choice question with 5 altenatives, of which exactly one is correct. The probability that he knows the correct answer is p, 0 < p < 1. If he does not know the correct answer, he randomly ticks one answer. Given that he has answered tha question correctly, the probabilty that he did not tick the answer randomly, is- |
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Answer» `(3p)/(4P + 3)` |
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