Approximately 26% of people have Rh negative blood. We will check the blood tests of the next 12 people to enter an emergency clinic with injuries that may require transfusion. Assume no two belong to the same family. a) What is the probability that exactly 5 of those patients will have Rh negative blood? b) What is the probability that at least 3 of them will have Rh negative blood? c) What are the expected number and standard deviation of the number of these patients with Rh negative blood?
Approximately 26% of people have Rh negative blood. We will check the blood tests of the next 12 people to enter an emergency clinic with injuries that may require transfusion. Assume no two belong to the same family. a) What is the probability that exactly 5 of those patients will have Rh negative blood? b) What is the probability that at least 3 of them will have Rh negative blood? c) What are the expected number and standard deviation of the number of these patients with Rh negative blood?
College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section: Chapter Questions
Problem 14T: An unbalanced coin is weighted so that the probability of heads is 0.55. The coin is tossed ten...
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Approximately 26% of people have Rh negative blood. We will check the blood tests of the next 12 people to enter an emergency clinic with injuries that may require transfusion. Assume no two belong to the same family.
a) What is the probability that exactly 5 of those patients will have Rh negative blood?
b) What is the probability that at least 3 of them will have Rh negative blood?
c) What are the expected number and standard deviation of the number of these patients
with Rh negative blood?
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