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.Related information is given in the table. $\begin{array}{lcc}
&\text { o of Dinners }&\text { o of Dinners Packed }\
\text { Worker } & \text { Packed } & \text { with No Napkin } \
\text { Joe } & 25 \% & 6 \% \
\text { Jan } & 20 \% & 2 \% \
\text { Cheryl } & 20 \% & 10 \% \
\text { Clay } & 35 \% & 4 \%
\end{array}$
What is the probability that there is not a napkin included for a given order?
A)0.22
B)0.24
C)0.053
D)0.015
E)0.04

Question

Quizplus · Accepted Answer

The probability that there is not a napkin included is calculated by summing the products of the proportion of dinners packed by each worker and the proportion of those dinners packed without a napkin: $ (0.25 \times 0.06) + (0.20 \times 0.02) + (0.20 \times 0.10) + (0.35 \times 0.04) = 0.015 + 0.004 + 0.02 + 0.014 = 0.053 $.

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