A fast food restaurant just leased a new freezer for three years. The restaurant’s research suggested that during a given year 70% of these freezers need no repairs, 16% needed to be serviced once,...

A fast food restaurant just leased a new freezer for three years. The restaurant’s research suggested that during a given year 70% of these freezers need no repairs, 16% needed to be serviced once, 10% twice, 4% three times, and none required more than three repairs.


a) Create a probability model.

b) Give the mean and SD of the number of repairs per year for a freezer.

c) How many times should the restaurant expect to have to get this freezer repaired over the three-year term of the lease?