Let x denote the lifetime (in thousands of hours) of a
Chapter 0, Problem 7.20(choose chapter or problem)
Let x denote the lifetime (in thousands of hours) of a certain type of fan used in diesel engines. The density curve of x is as pictured: Shade the area under the curve corresponding to each of the following probabilities (draw a new curve for each part): a. b. c. d. The probability that the lifetime is at least 25,000 hr e. The probability that the lifetime exceeds 25,000 hr
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