Essay
The time it takes a technician to fix a computer problem is exponentially distributed, with a mean of 15 minutes.
a. What is the probability density function for the time it takes a technician to fix a computer problem?
b. What is the probability that it will take a technician less than 10 minutes to fix a computer problem?
c. What is the variance of the time it takes a technician to fix a computer problem?
d. What is the probability that it will take a technician between 10 to 15 minutes to fix a computer problem?
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