A person attends a test in which there are 4 options for a qstn out of whick one is correct. He can guess an answer vth probability of 1/3 and can copy vth 1/8. The probability that he had copied and the answer is correct is 1/8. find prob that the answer is correct and he knows the answer.

>17/29
>23/39
>24/39
>17/39

• Data is incomplete
• 12 years agoHelpfull: Yes(3) No(1)
• now in these type of cases where can't determine is not given..start guessing..
  given dat prob. of guessing the ans. is 1/3.. it means prob. of " he knows the ans. is 2/3..now cheak the option which is the multiple of 2/3. then it may be 3rd option.
  
• 11 years agoHelpfull: Yes(1) No(0)