A large group of people should be examined for two common symptoms of a certain

Question

A large group of people should be examined for two common symptoms of a certain disease. it is considered that 20% of people present only the symptom A, 30% have only the B symptom and 5% have both symptoms, and the rest have no symptoms. for a person chosen at random from this group, find the probability that the person has at least one symptom A large group of people should be examined for two common symptoms of a certain disease. it is considered that 20% of people present only the symptom A, 30% have only the B symptom and 5% have both symptoms, and the rest have no symptoms. for a person chosen at random from this group, find the probability that the person has at least one symptom

Explanation / Answer

P(at least one symptom) = 0.2 * 0.7 + 0.3 * 0.8 + 0.05 = 0.43

                   

                

               

      

      

     

       

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