2.5.11. The amount of time, in hours, that a machine functions before breakdown is a continuous random variable Withpdff(t)=120- {120²Basic concepts from probability theory Chapter | 2 71-1/120,0,1201 <0.What is the probability that this machine will function between 98 and 145 hours before breaking down? What isthe probability that it will function less than 160 hours?

Answered: The amount of time, in hours, that a…

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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Users are connected to a database server through a network. Users request files from the Database server. The database server takes a period of time that is exponentially distributed with mean 5 seconds to process a request.Find the probability that 10 requests are processed by the server during the first 1 minutes Determine the probability that no request is processed by the server during the first 2 minutes Determine the average number of requests processed in 2 minutes
Please answer in 4 decimal places
The table summarizes results from 987 pedestrian deaths that were caused by automobile accidents. Pedestrian Deaths Driver Pedestrian Intoxicated? Intoxicated? Yes No Yes 60 73 No 282 572 If one of the pedestrian deaths is randomly selected, find the probability that the pedestrian was intoxicated or the driver was intoxicated. Please enter a decimal to 4 decimal places. Probability =
Find the probability of 4 coins falling all tails of when tossed simultaneously Answer should be rounded to 4 decimals
Question A college has a total enrollment of 2445 students, and 469 of them are left-handed. Use a calculator to determine the probability that a survey of 53 students will find that 9 or fewer students are left-handed. Round the σp^ answer to three decimal places and all other answers to two decimal places.
Suppose that the probability that any stock increases in price (over a 3 month period of time) is 60%. What is the probability that in a sample of 145 stocks that you buy that less than 55% increase in price (over a 3 month period of time)? (please round your answer to 4 decimal places)
The table summarizes results from 980 pedestrian deaths that were caused by automobile accidents. Driver Intoxicated? Pedestrian Intoxicated? Yes No Yes 60 69 No 238 613 If one of the pedestrian deaths is randomly selected, find the probability that both the pedestrian and the driver were intoxicated. Please enter a decimal to 4 places.
When do creative people get their good ideas? USA Today did a survey of 966 inventors (who hold U.S. patents) and obtained the following information. Assuming that the time interval includes the left limit and all the times up to but not including the right limit, the probability that an inventor has a good idea during each time interval is the following: P(6 A.M.-noon) = 290/966, P(noon-6 P.M.) = 135/966, P(6 P.M.-midnight) = 319/966, P(midnight-6 A.M) = 222/966. State whether the following statement is true or false.All the outcomes are not equally likely.
The table summarizes results from 975 pedestrian deaths that were caused by automobile accidents. Pedestrian Deaths DriverIntoxicated? Pedestrian Intoxicated? Yes No Yes 47 75 No 252 601 If one of the pedestrian deaths is randomly selected, find the probability that the pedestrian was not intoxicated but the driver was. Please enter a decimal to 4 places.Probability =
The life X (in hours) of a battery in constant use is a random variable with exponential density. What is the probability that the battery will last more than 12 hours (h) if the average life is 8 h?
where is the 500 coming from when finding the expected frequency?
i don't understand how to solve this.

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