find the probability P₁ that at least 9 out of 11 patients will recover.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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How was the correct answer of 0.6174 attained?

Historical statistics showed that every person infected by a virus will recover independently with probability 0. 8. A medicine
company has developed a new medicine for treatment of this infection. To test the effectiveness of the medicine, the company
selected at random 11 patients infected by the virus and treated with the medicine. 9 patients recovered shortly thereafter.
Assume the medicine is completely ineffective,
1. find the probability P₁ that at least 9 out of 11 patients will recover.
P1 0.6174
=
Transcribed Image Text:Historical statistics showed that every person infected by a virus will recover independently with probability 0. 8. A medicine company has developed a new medicine for treatment of this infection. To test the effectiveness of the medicine, the company selected at random 11 patients infected by the virus and treated with the medicine. 9 patients recovered shortly thereafter. Assume the medicine is completely ineffective, 1. find the probability P₁ that at least 9 out of 11 patients will recover. P1 0.6174 =
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