JEE Advanced Model Paper 20 with solutions for online practice

In an examination an examinee either guesses or copies or knows the answer to a “numerical answer”question, whose answer is a digit from 1 to 9. The chance that he makes a guess or copies is, each equalto the probability of getting the same number when two identical dies are rolled. The probability that heanswers correctly given that he copied it is 1/8. If P is the probability that he knew the answer to thequestion, given that he answered it correctly, then find

250P

27