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Time between process problems (Probability distributions)
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Spunkerspawn
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5
Feb7-12, 07:18 PM
P: 9
I completely understand what you mean for (c) as in just one problem might be before 120 days but the remaining 3 could happen after 120 days. But I believe, in this case, it is just asking for the exact fourth problem to happen after 120 days.