The times between failures on a personal computer follow an exponential distribution with a mean of 300,000 hours. What is the probability of:
a. A failure in less than 100,000 hours?
b. No failure in the next 500,000 hours?
c. The next failure occurring between 200,000 and 350,000 hours?
d. What are the mean and standard deviation of the time between failures? |

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