Assume that the chances of a patient having a heart attack is 40%. It is also assumed that a meditation and yoga course reduce the risk of heart attack by 30% and prescription of certain drug reduces its chances by 25%. At a time a patient can choose any 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 suffers a heart attack. Find the probability that the patient followed a course of meditation and yoga?

Explanation

To solve the problem step by step, we will use the concepts of probability and Bayes' theorem.

### Step 1: Define the Events
Let:
- Event A: The patient follows a course of meditation and yoga.
- Event B: The patient suffers a heart attack.

### Step 2: Given Probabilities
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