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Results from a survey of urban traffic are summarized in the table below showing the number of cars allocated to each of four categories of average speed. Average speed (mph) 3. 20 30 40 50 123 168 56 Number of cars 86 In a subsequent survey the speeds of 24 independent cars were measured. Among those 24 cars: a) What is the expected number of cars that would be allocated to an average speed less than 30 mph? b) What is the probability that exactly 15 cars would be allocated to an average speed less than 30 mph? c) What is the probability that at least 7 cars would be allocated to an average speed less than 30 mph?

Results from a survey of urban traffic are summarized in the table below showing the number of cars allocated to each of four categories of average speed. Average speed (mph) 3. 20 30 40 50 123 168 56 Number of cars 86 In a subsequent survey the speeds of 24 independent cars were measured. Among those 24 cars: a) What is the expected number of cars that would be allocated to an average speed less than 30 mph? b) What is the probability that exactly 15 cars would be allocated to an average speed less than 30 mph? c) What is the probability that at least 7 cars would be allocated to an average speed less than 30 mph?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Results from a survey of urban traffic are summarized in the table below showing the number of cars allocated to each of four categories of average speed. Average speed (mph) 3. 20 30 40 50 123 168 56 Number of cars 86 In a subsequent survey the speeds of 24 independent cars were measured. Among those 24 cars: a) What is the expected number of cars that would be allocated to an average speed less than 30 mph? b) What is the probability that exactly 15 cars would be allocated to an average speed less than 30 mph? c) What is the probability that at least 7 cars would be allocated to an average speed less than 30 mph?
Transcribed Image Text:Results from a survey of urban traffic are summarized in the table below showing the number of cars allocated to each of four categories of average speed. Average speed (mph) 3. 20 30 40 50 123 168 56 Number of cars 86 In a subsequent survey the speeds of 24 independent cars were measured. Among those 24 cars: a) What is the expected number of cars that would be allocated to an average speed less than 30 mph? b) What is the probability that exactly 15 cars would be allocated to an average speed less than 30 mph? c) What is the probability that at least 7 cars would be allocated to an average speed less than 30 mph?
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