A new drug is designed to reduce a person's blood pressure. Eight randomly selected hypertensive patients receive the new drug. Suppose the probability that a hypertensive patient's blood pressure drops if he or she receives the new drug is 0.5. Assume the number of hypertensive patients out of the eight whose blood pressure drops follows a binomial model. X P(X= x) 0 0,0039 1 0.0313 2 0.1094 3 0.2187 0.2734 0.2187 0.1094 0.0313 8 0.0039 What is the probability that either 4 or 5 patients see a reduction in blood pressure when taking this medication? O a.0.4921 O b.0.2734 O.0.5079 O d.0.2187

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