A box contains glass lenses used for traffic signals. Six are red, four are yellow, and seven are green. If two are chosen at random find the probability they are both green, if:
a. the first lense is replaced before the second is chosen
b. the first lense is not replaced before the second is chosen.
Solution Preview
Total number of lenses = 6+4+7 = 17
<br>a. When the first lens is chosen, the probability of it being green =
<br>7/17. Now the lens is put back in ...
Freeway Traffic. According to a Scientific American article (May, 1990), current freeways can sustain about N vehicles per lane per hour in smooth traffic flow at speed . Above that figure the traffic flow becomes "turbulent" (stop-and-go).
1) If a vehicle is of length L on the average, what is the average spacing between ve
A study of vehicle flow characteristics on acceleration lanes found that one out of every six vehicles uses less than 1/3 of the acceleration lane before merging into the traffic. Suppose we monitor the location of the merge for the next 5 cars that enter the acceleration lane.
a.)What is the probability that none of the veh
In 1981, President Ronald Regan fired striking air traffic controllers and kept air traffic going with replacement controllers. Since then the practice of replacing striking workers with replacement workers has been used on several occasions. What is your position on this practice? Are you for or against the practice?
The follow table contains the probability distribution for the number of traffic accidents daily in a small city.
See attached.
a. Compute the mean number of accidents per day.
b. Compute the standard deviation.
Please show work.
45. Is lack of sleep causing traffic fatalities? A study conducted under the auspices of the National Highway Traffic Safety Administration found that the average number of fatal crashes caused by drowsy drivers each year was 1550 (Business Week, January 26, 2004).
Assume the annual number of fatal crashes
Assume the probability of a tire blowout is 0.102% per 50,000 miles of use and that a person travels 13,000 miles per year in a car. Assume that the probability of loss of control is 30% if the blowout occurs on the front tires and 15% for the rear tires. If control is lost, the probability is 50% of veering to the right and 50%
How many signals from the CO ligands do you expect to see in the 13C NMR spectrum of each of these complexes? Explain.
a) [V(CO)6]
b) cis-[Rh(Br)(CO)2(PPh3)]
c) [Fe2(CO)4(Cp)2]
d) [Mn(CO)5(CH3)]
The graph below shows the results of a survey of drivers who were asked to name the most annoying habit of other drivers. You randomly select six people who participate in the survey and ask each one of them to name the most annoying habit of other drivers. Let x represent the number who named talking on the cell phone as the mo
Suppose that, in a particular city, airport A handles 50% of all airline traffic, and airports B and C handle 30% and 20%, respectively. The detection rates for weapons at the three airports are .9, .5, and .4, respectively. If a passenger at one of the airports is found to be carrying a weapon through the boarding gate, what is
