Assume that the chances of a patient suffering from high blood pessure is 613%. It is also assumed that a course of meditation reduces the risk of'high blood pressure by 45% and prescription of certain drugs reduces its chances by 55%. At a time, a patient can choose an}.r one of the two options with equal probabilities. It is given that after going through one of the two options, the patient selected at random does not suffer from high blood pressure. Find the probability that the patient chose a course of meditation