Of the last 6 trains to arrive at Westminster Station, 3 were on time. What is the experimental probability that the next train to arrive will be on time?
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- Suppose that the probability that a child living in an urban area in the United States is obese is 20%. If a social worker sees 15 children living in urban areas, what is the probability that 5 are obese? Enter response as .xxxxThe probability that an electronic circuit board contains dirty particles is 0.01. Considering that the plates are independent, what is the probability that 125 plates will be analyzed until we find the first particle?Please give me solution within 30 min.
- Use the following information to answer the next question. A committee of 3 people is to be randomly selected from a group of 8 people, including Sarah. 12. Determine the probability that Sarah is selected to be on the three-person committee.Professor John is designing a water flask and he needs to know the probability that the filtration system will fail during a water cleaning. Based on previous data, Professor John estimates that the probability of a filtration system failure during the filtration cleaning is 0.05. If the water flask is used for 365 days in a year, what is the probability that the filtration system will not fail during any cleaning in a year?Based on past experience, the store manager estimates that the probability that any one customer will make a purchase is .30. What is the probability that two of the next three customers will make a purchase?
- Traffic on highway 64 during rush hour travels at 70 miles/hour. The Missouri Department of Transportation puts in a sensor to detect when a car passes a specific point and determines that the average rate at which cars pass that point is 3 cars/sec during rush hour. What is the probability that a stretch of one mile of the highway contains exactly 250 cars during rush hour.Jack has just been given a ten-question multiple choice quiz in history class. Each question has five answers, of which only one is correct. Since Jack has not attended class recently, he does not know any of the answers. Assuming Jack guesses randomly on all ten questions, find the probability that he will answer six or more of the questions correctly and avoid an F.The probability that Mr. Johnson goes for an evening walk on any given day during the winter is 0.56. Out of 89 days of winter, the number of days that Mr. Johnson is expected not to take an evening walk to the nearest day, is
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