Acalifornia water company has determined that the average customer billing is $1,100 per year and the amounts billed have an exponential distribution. a. calculate the probability that a randomly chosen customer would spend more than $ 4,000. b. compute the probability that a randomly chosen customer would spend more than the average amount spent by all customers of this company.

We can solve this problem through exponential distribution.

We have that,

clearing for \lambda we have

The exponential distribution is given by,

a) We define our probability for x>4000, that is,

b) We define our probability for x>1100, that is

b.an increase in a causes b to decrease

the least value out of the data shown is 5, maybe if you post a picture with it i could a little more.

step-by-step explanation: