Solved: The life span in hours of an electrical component
Chapter 4, Problem 3.69(choose chapter or problem)
The life span in hours of an electrical component is a random variable with cumulative distribution function
\(F(x)=\left\{\begin{array}{ll} 1-e^{-\frac{x}{50}}, & x>0 \\ 0, & \text { eleswhere } \end{array}\right.\)
(a) Determine its probability density function.
(b) Determine the probability that the life span of such a component will exceed 70 hours.
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