Discuss the below:
Q: The useful life of a radial tire is normally distributed with a mean of 30,000 miles and a standard deviation of 5000 miles. The company makes 10,000 tires a month.
a. About how many tires will last between 25,000 and 35,000 miles?
b. About how many tires will last more that 40,000 miles?
c. About how many tires will last less than 25,000 miles?
d. What is the probability that if you buy a radial tire at random, it will last between 20,000 and 35,000 miles?