(a) What is the probability that 3 of the faculty have blood type O-negative? (Round your answer to the nearest thousandth).

College Algebra
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ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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Suppose a researcher goes to a small college of 200 faculty, 12 of which have blood type O-
negative. He obtains a simple random sample of n= 20 of the faculty. Let the random variable X
represent the number of faculty in the sample of size that have blood type O-negative.
(a) What is the probability that 3 of the faculty have blood type O-negative? (Round youranswer
to the nearest thousandth).
(b) What is the probability that a none (x= 0) of the faculty has blood type O-negative? (Round
your answer to the nearest thousandth).
Transcribed Image Text:Suppose a researcher goes to a small college of 200 faculty, 12 of which have blood type O- negative. He obtains a simple random sample of n= 20 of the faculty. Let the random variable X represent the number of faculty in the sample of size that have blood type O-negative. (a) What is the probability that 3 of the faculty have blood type O-negative? (Round youranswer to the nearest thousandth). (b) What is the probability that a none (x= 0) of the faculty has blood type O-negative? (Round your answer to the nearest thousandth).
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