In testing a certain kind or truck tire over rugged terrain, it is found that 40% of the trucks fail to complete the test run without a blowout. (a) Of the next 12 trucks tested, how many of them would you expect to have blowouts? (b) What is the variance of the number of blowouts experienced by the 12 trucks? What does that mean?

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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In testing a certain kind or truck tire over rugged terrain, it is found that 40% of the trucks fail to complete the test run without a blowout.
(a) Of the next 12 trucks tested, how many of them would you expect to have blowouts?
(b) What is the variance of the number of blowouts experienced by the 12 trucks? What does that mean?
Transcribed Image Text:In testing a certain kind or truck tire over rugged terrain, it is found that 40% of the trucks fail to complete the test run without a blowout. (a) Of the next 12 trucks tested, how many of them would you expect to have blowouts? (b) What is the variance of the number of blowouts experienced by the 12 trucks? What does that mean?
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