Use a Contingency Table A) 091
B) 0

Multiple Choice

Use a contingency table.
-Suncast Cable offers high definition (HD) cable TV, Internet and phone services to
Its customers. For those service issues that can be resolved by calling its technical
Support center, Suncast's goal is to have the problem solved within 30 minutes. In order
To determine how well it is achieving this goal, they monitored calls to its technical
Support center over the last three months. The data compiled is shown in the table below.
What is the probability that a call to the technical support center involved an issue with
Internet service or was not resolved within 30 minutes? $$\begin{array} { | l | l | l | l | } \hline \text { Problem Resolved? } & \text { HD cable TV } & \text { Internet } & \text { Phone } \\\hline \text { Yes } & 123 & 350 & 77 \\\hline \text { No } & 115 & 122 & 63 \\\hline\end{array}$$

A) 0.91
B) 0.55
C) 0.35
D) 0.76
E) 0.14