The speed of cars on a stretch of road is normally distributed with an average 51 miles per hour with a standard deviation of 5.
9 miles per hour. What is the probability that a randomly selected car is violating the speed limit of 50 miles per hour?
0.43
0.50
0.51
0.57
1 answer:
Answer: 0.57
Step-by-step explanation:
Given : The speed of cars on a stretch of road is normally distributed .
Population Mean =
Standard deviation :
Let x be the random variable that represents the speed of cars on a stretch of road .
z-score :
For x= 50.
By using the standard normal distribution table ,
The probability that a randomly selected car is violating the speed limit of 50 miles per hour :-
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