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2-73. The probability that a builder of airport terminals will win a contract for construction of terminals in country A is 0.40, and the probability that it will win a contract in country B is 0.30. The company has a 0.10 chance of winning the contracts in both countries. What is the probability that the company will win at least one of these two prospective contracts?

2-73. The probability that a builder of airport terminals will win a contract for construction of terminals in country A is 0.40, and the probability that it will win a contract in country B is 0.30. The company has a 0.10 chance of winning the contracts in both countries. What is the probability that the company will win at least one of these two prospective contracts?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.8: Probabilities Of Disjoint And Overlapping Events
Problem 2C
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2-73. The probability that a builder of airport terminals will win a contract for construction of terminals in country A is 0.40, and the probability that it will win a contract in country B is 0.30. The company has a 0.10 chance of winning the contracts in both countries. What is the probability that the company will win at least one of these two prospective contracts? 3-40. A computer laboratory in a school has 33 computers. Each of the 33 computers has 90% reliability. Allowing for 10% of the computers to be down, an instructor specifies an enrollment ceiling of 30 for his class. Assume that a class of 30 students is taken into the lab. 3-48. A mainframe computer in a university crashes on the average 0.71 time in a semester. a. What is the probability that it will crash at least two times in a given semester? b. What is the probability that it will not crash at all in a given semester? c. The MIS administrator wants to increase the probability of no crash at all in a semester to at least 90%. What is the largest that will achieve this goal? 4-24. If X is normally distributed with mean 500 and standard deviation 20, find the probability that X will be above 555. 4-49. Private consumption as a share of GDP is a random quantity that follows a roughly normal distribution. According to an article in BusinessWeek, for the United States that was about 71%.6 Assuming that this value is the mean of a normal distribution, and that the standard deviation of the distribution is 3%, what is the value of Mim =I
Transcribed Image Text:2-73. The probability that a builder of airport terminals will win a contract for construction of terminals in country A is 0.40, and the probability that it will win a contract in country B is 0.30. The company has a 0.10 chance of winning the contracts in both countries. What is the probability that the company will win at least one of these two prospective contracts? 3-40. A computer laboratory in a school has 33 computers. Each of the 33 computers has 90% reliability. Allowing for 10% of the computers to be down, an instructor specifies an enrollment ceiling of 30 for his class. Assume that a class of 30 students is taken into the lab. 3-48. A mainframe computer in a university crashes on the average 0.71 time in a semester. a. What is the probability that it will crash at least two times in a given semester? b. What is the probability that it will not crash at all in a given semester? c. The MIS administrator wants to increase the probability of no crash at all in a semester to at least 90%. What is the largest that will achieve this goal? 4-24. If X is normally distributed with mean 500 and standard deviation 20, find the probability that X will be above 555. 4-49. Private consumption as a share of GDP is a random quantity that follows a roughly normal distribution. According to an article in BusinessWeek, for the United States that was about 71%.6 Assuming that this value is the mean of a normal distribution, and that the standard deviation of the distribution is 3%, what is the value of Mim =I
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