Question: Step A: Average time 5 minutes, stdev = 1.2 minutes Step B: Average time 9 minutes, stdev = 0.9 minutes Step C: Average time 11

Step A: Average time 5 minutes, stdev = 1.2 minutes

Step B: Average time 9 minutes, stdev = 0.9 minutes

Step C: Average time 11 minutes, stdev = 2.1 minutes

Given the above data on a three-stage production process, what is the probability step C takes longer than step B?

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