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A student answers a multiple choice ques...

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 lt p lt 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

`(3p)/(4p +3)`

B

`(5p)/(3p + 2)`

C

`(5p)/(4p +1)`

D

`(4p)/(3p+1)`

Text Solution

Verified by Experts

The correct Answer is:
C
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TARGET PUBLICATION-PROBABILITY-COMPETITIVE THINKING (ADDITION THEOREM AND CONDITIONAL PROBABILITY)
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