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A certain job is completed in three steps in series. The means and standard deviations for the steps are (in minutes): Step 1 2 3 Mean 17 13 13 Standard Deviation 2 1 2

Assuming independent steps and normal distributions, compute the probability that the job will take less than 40 minutes to complete.

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    Don't forget to accept answers to your previous questions if you find them fulfilling.2012-11-13

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