# Question

According to Daily Mail (February 28, 2012), there was an average of one complaint every 12 seconds against Britain's biggest banks in 2011. It is reasonable to assume that the time between complaints is exponentially distributed.

a. What is the mean time between complaints?

b. What is the probability that the next complaint will take less than the mean time?

c. What is the probability that the next complaint will take between 5 and 10 seconds?

a. What is the mean time between complaints?

b. What is the probability that the next complaint will take less than the mean time?

c. What is the probability that the next complaint will take between 5 and 10 seconds?

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