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Practice Exam 2

# Practice Exam 2 - Math 403 Practice Exam 2 1 A bag contains...

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Practice Exam 2 1. A bag contains five blue balls and three red balls. A boy draws a ball, and then draws another ball, without putting back the first. What is the probability that he draws 2 red balls? 2. Suppose 2 of the next 12 persons entering a bar are underage. If a police officer randomly selects 3 of the next 12 persons entering the bar, what is the probability the he selects neither of the underage persons? 3. If 30% of all car accidents are due to distracted drivers, what is the probability that of the next 20 accidents 2 are due to distracted driving? 4. A starter motor utilized in a space vehicle possesses a high reliability and is reputed to start on any given occasion with probability .99999. If the starts are considered independent, what is the probability of at least one failure in the next 10,000 starts? 5. The number of complaints, which a dry-cleaning establishment receives per day, is a random variable having a Poisson distribution with an average of 3.3.

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Practice Exam 2 - Math 403 Practice Exam 2 1 A bag contains...

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