33. What is the probability that 5 of the swimming pools have safe chlorine levels? A. 39.56% B. 22.96% C. 24.73% D. 10.99% 34. What is the probability that 7 or more of the swimming pools have safe chlorine levels? A. 39.56% B. 22.96% C. 24.73% D. 10.99% 35. What is the probability that three or less of the swimming pools have unsafe chlorine levels? A. 39.56% B. 22.96% C. 24.73% D. 10.99%

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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Questions 33-40 use the following scenario. A researcher examines a collection of water samples from
19 different pools. The researcher has determined that the probability that the chlorine level in a pool is
within a safe limit is 37% for any swimming pool that the researcher studies.
33. What is the probability that 5 of the swimming pools have safe chlorine levels?
A. 39.56%
C. 24.73%
B. 22.96%
D. 10.99%
34. What is the probability that 7 or more of the swimming pools have safe chlorine levels?
A. 39.56%
B. 22.96%
C. 24.73%
D. 10.99%
35. What is the probability that three or less of the swimming pools have unsafe chlorine levels?
A. 39.56%
B. 22.96%
C. 24.73%
D. 10.99%
36. What is the probability that between 5 and 9 of the swimming pools have unsafe chlorine levels?
A. 39.56%
B. 22.96%
C. 24.73%
D. 10.99%
38. What is expected number of pools that have a safe level of chlorine?
A. 39.56%
B. 22.96%
C. 24.73%
37. What is the probability that more than 10 of the swimming pools have safe chlorine levels?
A. 39.56%
B. 22.96%
C. 24.73%
D. 10.99%
39. What is the standard deviation in the number of pools that have a safe chlorine level?
A. 39.56%
B. 22.96%
C. 24.73%
D. 10.99%
D. 10.99%
40. Approximately how many of the sampled swimming pools would you expect to have a safe level of
chlorine?
A. 39.56%
B. 22.96%
C. 24.73%
D. 10.99%
Transcribed Image Text:Questions 33-40 use the following scenario. A researcher examines a collection of water samples from 19 different pools. The researcher has determined that the probability that the chlorine level in a pool is within a safe limit is 37% for any swimming pool that the researcher studies. 33. What is the probability that 5 of the swimming pools have safe chlorine levels? A. 39.56% C. 24.73% B. 22.96% D. 10.99% 34. What is the probability that 7 or more of the swimming pools have safe chlorine levels? A. 39.56% B. 22.96% C. 24.73% D. 10.99% 35. What is the probability that three or less of the swimming pools have unsafe chlorine levels? A. 39.56% B. 22.96% C. 24.73% D. 10.99% 36. What is the probability that between 5 and 9 of the swimming pools have unsafe chlorine levels? A. 39.56% B. 22.96% C. 24.73% D. 10.99% 38. What is expected number of pools that have a safe level of chlorine? A. 39.56% B. 22.96% C. 24.73% 37. What is the probability that more than 10 of the swimming pools have safe chlorine levels? A. 39.56% B. 22.96% C. 24.73% D. 10.99% 39. What is the standard deviation in the number of pools that have a safe chlorine level? A. 39.56% B. 22.96% C. 24.73% D. 10.99% D. 10.99% 40. Approximately how many of the sampled swimming pools would you expect to have a safe level of chlorine? A. 39.56% B. 22.96% C. 24.73% D. 10.99%
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