Four Employees Who Work as Drive-Through Attendants at a Local

Multiple Choice

Four employees who work as drive-through attendants at a local fast-food restaurant are being evaluated. As part of a quality improvement initiative and employee evaluation, these workers were observed over three days. One of the statistics collected was the proportion of time the employee forgot to include a napkin in the bag. Also recorded was the proportion of all dinners packed by each employee. Related information is given in the table. You just purchased a dinner and found that there is no napkin in your bag. What is the probability that Cheryl prepared your order?

A) 0.377
B) 0.091
C) 0.083
D) 0.500
E) 0.020