. In a test an examinee either guesses or copies


copies or knows the answer to a multiple choice question with four choices.

The probability that he makes a guess is  13 and the probability that he copies the answer is  16 .

The probability that his answer is correct given that he copied it is   18.

The probability that he knew the answer to the question given that he correctly answered it is   4k29 .Find the value of k

 

Best Answer

Explanation:

Let E1 be the event that examinee guesses the answer to the question,

E2 be the event that examine copies the answer to the question,

E3  be the event that examine knows the answer to the question,

And, E be the event that the answer is correct.

examinee guesses

 

On comparing this with 4k /29 we will get k=6

Final Answer:

 

The value of k=6.

 

 

Talk to Our counsellor