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COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

A student answers a multiple choice question with 5 alternatives, 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 the question correctly, the probability that he did not tick the answer randomly, is

A
$$\frac{3p}{4p+3}$$
B
$$\frac{5p}{3p+2}$$
C
$$\frac{5p}{4p+1}$$
D
$$\frac{4p}{3p+1}$$
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