Home Maths Probability NTA Abhiyas Question In a test, an examinee either guesses or cop…
Maths Probability NTA Abhiyas Question Single Correct MCQ
Published on: August 14, 2026

In a test, an examinee either guesses or copies or knows the answer to a multiple choice question with four choices. The probability that he makes a guess is and the probability that he copies the answer is . The probability that his answer is correct given that he copies it is . The probability that his answer is correct, given that he guesses it is . The probability that he knew the answer to the question given that he correctly answered, is

A
B
C
D

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The correct answer is:
C

Let E 1 ,E 2 and E 3 are the events that the examinee guesses, copies and knows the answer and E is the event that he answers correctly.

Then,P(E l ) = ,P(E 2 ) =

andP(E 3 ) =

Required probability =

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