Certain transportation company has a fleet of 210 vehicles.The average age of the vehicles is 4.25 years, with a standard deviation of 18 months.In a random sample of 40 vehicles, what is the probability that the average age of vehicles in the sample will be less than 4 years?
A)0.146
B)0.163
C)0.180
D)0.197
E)0.214

Question

Quizplus · Accepted Answer

The correct answer is A because the probability that the average age of vehicles in the sample will be less than 4 years is 0.146.

Certain Transportation Company Has a Fleet of 210 Vehicles