The tread lives of the Super Titan radial tires under normal driving conditions are normally distributed with a mean of 50,000 mi and a standard deviation of 4,000 mi.

Round your answer to four decimal places, if necessary.

What is the probability that a tire selected at random will have a tread life of more than 45,200 mi?
__________

If four new tires are installed in a car and they experience even wear, determine the probability that all four tires still have useful tread lives after 45,200 mi of driving.
__________

Question

The tread lives of the Super Titan radial tires under normal driving conditions are normally distributed with a mean of 50,000 mi and a standard deviation of 4,000 mi.
​
Round your answer to four decimal places, if necessary.
​
What is the probability that a tire selected at random will have a tread life of more than 45,200 mi?
​  __________
​
If four new tires are installed in a car and they experience even wear, determine the probability that all four tires still have useful tread lives after 45,200 mi of driving.
​  __________

Quizplus · Accepted Answer

The Answer of The tread lives of the Super Titan radial tires under normal driving conditions are normally distributed with a mean of 50,000 mi and a standard deviation of 4,000 mi.
​
Round your answer to four decimal places, if necessary.
​
What is the probability that a tire selected at random will have a tread life of more than 45,200 mi?
​  __________
​
If four new tires are installed in a car and they experience even wear, determine the probability that all four tires still have useful tread lives after 45,200 mi of driving.
​  __________

The Tread Lives of the Super Titan Radial Tires Under