The life expectancy of a particular brand of tire is normally distributed with a mean of 30,000 and a standard deviation of 6,000 miles. What is the probability that a randomly selected tire will have a life of exactly 41,400 miles?   a. 0     b. 0.028717     c. 0.971283     d. 0.471283

MATLAB: An Introduction with Applications
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The life expectancy of a particular brand of tire is normally distributed with a mean of 30,000 and a standard deviation of 6,000 miles. What is the probability that a randomly selected tire will have a life of exactly 41,400 miles?
  a. 0  
  b. 0.028717  
  c. 0.971283  
  d. 0.471283 
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