Suppose that a patient is selected randomly from the those described ,The article “Term Efficacy of Ribavirin Plus Interferon Alfa in the Treatment of Chronic Hepatitis C,” [Gastroenterology (1996, Vol. 111, no. 5, pp. 1307–1312)], considered the effect of two treatments and a control for treatment of hepatitis C. The following table provides the total patients in each group and the number that showed a complete (positive) response after 24 weeks of treatment.

Let A denote the event that the patient is in the group treated with interferon alfa, and let B denote the event that the patient has a complete response.

Determine the following probabilities.

(a) P(A)

(b) P(B)

(c)P(AÇB)

(d) P(AÈB)

(e) P(A¢ÈB)