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The failure intensity for a basic model as a function of failures experienced is given as $\lambda (\mu) - \lambda_0[1-(\mu)/(V_0)]$ where $\lambda_0$ is the initial failure intensity at the start of the execution, $\mu$ is the average or expected number of failures at a given point in time, the quantity $V_0$ is the total number of failures that would occur in infinite time.

Assume that a program will experience 100 failures in infinite time, the initial failure intensity was 10 failures/CPU hr. Then the decrement of failures intensity per failure will be

  1. 10 per CPU hr
  2. 0.1 per CPU hr
  3. -0.1 per CPU hr
  4. 90 per CPU hr
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ans is C  (-0.1 per CPU hr) 

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