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 ch

Answer

N/a

Explanation

Let `E_(1)` is the event patient followed a meditation and yoga and `E_(2)` is the event that patient followed prescription of certain drugs.
Therefore `E_(1)` and `E_(2)` are mutually exclusive and exhaustive events and
`P(E_(1))=1/2=P(E_(2))`
Let the event `E` represents that the selected patient suffers a heart attack.
`:.P(E/(E_(1)))=40/100(1-30/100)=28/100`
`P(E/(E_(2)))=40/100(1-25/100)=30/100`
`P` (patient suffers a heart attack, followed a course of meditation and yoga)
`P((E_(1))/E)=(P(E/(E_(1)))P(E_(1)))/(P(E/(E_(2)))P(E_(2)))`
`=(28/100xx1/2)/(28/100xx1/2+30/100xx1/2)=28/(28+30)`
`=28/58=14/29`