These days competitive examinations are held in online mode. During the examination student either guesses or copies or knows the answer of a multiple choice question (MCQ) with four choices each. The probability that a student makes guesses is $\frac{1}{3}$ and that he/she copies $\frac{1}{6}$. The probability of marking answer correctly when he/she copied is $\frac{1}{8}$ and probability of making answer correctly when he/she guesses is $\frac{1}{4}$. It is also assumed that a student marked answer correctly if he/she knows the answer.

By using the above mentioned information answer following question.