a) On average, how many days after the operating system is installed do you expect the first computer crash? b) What is the probability that the computer crashes for the first time on the fourteenth day after the operating system is installed? c) What is the probability that on the 30th day the computer crashes for the second time? d) What is the probability that at least one crash happens in at least 2 of the next 4 months (assuming that each month is 30 days in duration)?

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