1. An automobile dealership manager is comtemplating the placement of a series of new vehicles in the descending order of the most expensive to least expensive. The most expensive vehicles will greet potential customers as they enter the front doors of the dealership and will decrease in retail price as customers make their way down the large showroom area to the waiting, lounge, and maintenance areas. This particular vehicle sells five products of American-produced vehicles. The number of possible arrangements of theses new vehicles is best described matematically as a

a. combination

b. permutation

c. multiplication counting technique

d. binomial probability distribution

The mean amount of gasoline and services charged by Keys Refining Corporation credit customers is $70 each month. The distribution is approximately a normal distribution with a standard deviation of $10.

2. Keys Refining Corporation decided to send a special financing paln to charge account customers having the highest ten percent of the money charges. What is the dividin point between the customers who receive the special plan?

a. $75.50

b. $78.95

c. $80.75

d. $82.80