A Fast Food Restaurant Just Leased a New Freezer and Food

Multiple Choice

A fast food restaurant just leased a new freezer and food fryer for three years.The service contract for the freezer offers unlimited repairs for a fee of $125 a year plus a $35 service charge for each repair needed.The restaurant's research indicates that during a given year 80% of these freezers need no repairs, 11% needed to be serviced once, 5% twice, 4% three times, and none required more than three repairs.The standard deviation of the number of repairs for this freezer per year is ________________________ .

A) 0.72 repairs
B) 0.512 repairs²
C) 1.25 repairs
D) 2.5 repairs²
E) 0.33 repairs